diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index 3f9a4fda28a6..ed25660edd99 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -22,11 +22,8 @@ pub const advapi32 = @import("windows/advapi32.zig");
 pub const kernel32 = @import("windows/kernel32.zig");
 pub const ntdll = @import("windows/ntdll.zig");
 pub const ole32 = @import("windows/ole32.zig");
-pub const psapi = @import("windows/psapi.zig");
 pub const shell32 = @import("windows/shell32.zig");
 pub const ws2_32 = @import("windows/ws2_32.zig");
-pub const gdi32 = @import("windows/gdi32.zig");
-pub const winmm = @import("windows/winmm.zig");
 pub const crypt32 = @import("windows/crypt32.zig");
 pub const nls = @import("windows/nls.zig");
 
diff --git a/lib/std/os/windows/gdi32.zig b/lib/std/os/windows/gdi32.zig
deleted file mode 100644
index f7860c2ca196..000000000000
--- a/lib/std/os/windows/gdi32.zig
+++ /dev/null
@@ -1,53 +0,0 @@
-const std = @import("../../std.zig");
-const windows = std.os.windows;
-const BOOL = windows.BOOL;
-const DWORD = windows.DWORD;
-const WINAPI = windows.WINAPI;
-const HDC = windows.HDC;
-const HGLRC = windows.HGLRC;
-const WORD = windows.WORD;
-const BYTE = windows.BYTE;
-
-pub const PIXELFORMATDESCRIPTOR = extern struct {
-    nSize: WORD = @sizeOf(PIXELFORMATDESCRIPTOR),
-    nVersion: WORD,
-    dwFlags: DWORD,
-    iPixelType: BYTE,
-    cColorBits: BYTE,
-    cRedBits: BYTE,
-    cRedShift: BYTE,
-    cGreenBits: BYTE,
-    cGreenShift: BYTE,
-    cBlueBits: BYTE,
-    cBlueShift: BYTE,
-    cAlphaBits: BYTE,
-    cAlphaShift: BYTE,
-    cAccumBits: BYTE,
-    cAccumRedBits: BYTE,
-    cAccumGreenBits: BYTE,
-    cAccumBlueBits: BYTE,
-    cAccumAlphaBits: BYTE,
-    cDepthBits: BYTE,
-    cStencilBits: BYTE,
-    cAuxBuffers: BYTE,
-    iLayerType: BYTE,
-    bReserved: BYTE,
-    dwLayerMask: DWORD,
-    dwVisibleMask: DWORD,
-    dwDamageMask: DWORD,
-};
-
-pub extern "gdi32" fn SetPixelFormat(
-    hdc: ?HDC,
-    format: i32,
-    ppfd: ?*const PIXELFORMATDESCRIPTOR,
-) callconv(WINAPI) bool;
-
-pub extern "gdi32" fn ChoosePixelFormat(
-    hdc: ?HDC,
-    ppfd: ?*const PIXELFORMATDESCRIPTOR,
-) callconv(WINAPI) i32;
-
-pub extern "gdi32" fn SwapBuffers(hdc: ?HDC) callconv(WINAPI) bool;
-pub extern "gdi32" fn wglCreateContext(hdc: ?HDC) callconv(WINAPI) ?HGLRC;
-pub extern "gdi32" fn wglMakeCurrent(hdc: ?HDC, hglrc: ?HGLRC) callconv(WINAPI) bool;
diff --git a/lib/std/os/windows/psapi.zig b/lib/std/os/windows/psapi.zig
deleted file mode 100644
index 0ef7429232e8..000000000000
--- a/lib/std/os/windows/psapi.zig
+++ /dev/null
@@ -1,75 +0,0 @@
-const std = @import("../../std.zig");
-const windows = std.os.windows;
-const WINAPI = windows.WINAPI;
-const DWORD = windows.DWORD;
-const HANDLE = windows.HANDLE;
-const PENUM_PAGE_FILE_CALLBACKW = windows.PENUM_PAGE_FILE_CALLBACKW;
-const HMODULE = windows.HMODULE;
-const BOOL = windows.BOOL;
-const BOOLEAN = windows.BOOLEAN;
-const CONDITION_VARIABLE = windows.CONDITION_VARIABLE;
-const CONSOLE_SCREEN_BUFFER_INFO = windows.CONSOLE_SCREEN_BUFFER_INFO;
-const COORD = windows.COORD;
-const FILE_INFO_BY_HANDLE_CLASS = windows.FILE_INFO_BY_HANDLE_CLASS;
-const HRESULT = windows.HRESULT;
-const LARGE_INTEGER = windows.LARGE_INTEGER;
-const LPCWSTR = windows.LPCWSTR;
-const LPTHREAD_START_ROUTINE = windows.LPTHREAD_START_ROUTINE;
-const LPVOID = windows.LPVOID;
-const LPWSTR = windows.LPWSTR;
-const MODULEINFO = windows.MODULEINFO;
-const OVERLAPPED = windows.OVERLAPPED;
-const PERFORMANCE_INFORMATION = windows.PERFORMANCE_INFORMATION;
-const PROCESS_MEMORY_COUNTERS = windows.PROCESS_MEMORY_COUNTERS;
-const PSAPI_WS_WATCH_INFORMATION = windows.PSAPI_WS_WATCH_INFORMATION;
-const PSAPI_WS_WATCH_INFORMATION_EX = windows.PSAPI_WS_WATCH_INFORMATION_EX;
-const SECURITY_ATTRIBUTES = windows.SECURITY_ATTRIBUTES;
-const SIZE_T = windows.SIZE_T;
-const SRWLOCK = windows.SRWLOCK;
-const UINT = windows.UINT;
-const VECTORED_EXCEPTION_HANDLER = windows.VECTORED_EXCEPTION_HANDLER;
-const WCHAR = windows.WCHAR;
-const WORD = windows.WORD;
-const Win32Error = windows.Win32Error;
-const va_list = windows.va_list;
-const HLOCAL = windows.HLOCAL;
-const FILETIME = windows.FILETIME;
-const STARTUPINFOW = windows.STARTUPINFOW;
-const PROCESS_INFORMATION = windows.PROCESS_INFORMATION;
-const OVERLAPPED_ENTRY = windows.OVERLAPPED_ENTRY;
-const LPHEAP_SUMMARY = windows.LPHEAP_SUMMARY;
-const ULONG_PTR = windows.ULONG_PTR;
-const FILE_NOTIFY_INFORMATION = windows.FILE_NOTIFY_INFORMATION;
-const HANDLER_ROUTINE = windows.HANDLER_ROUTINE;
-const ULONG = windows.ULONG;
-const PVOID = windows.PVOID;
-const LPSTR = windows.LPSTR;
-const PENUM_PAGE_FILE_CALLBACKA = windows.PENUM_PAGE_FILE_CALLBACKA;
-
-pub extern "psapi" fn EmptyWorkingSet(hProcess: HANDLE) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumDeviceDrivers(lpImageBase: [*]LPVOID, cb: DWORD, lpcbNeeded: *DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumPageFilesA(pCallBackRoutine: PENUM_PAGE_FILE_CALLBACKA, pContext: LPVOID) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumPageFilesW(pCallBackRoutine: PENUM_PAGE_FILE_CALLBACKW, pContext: LPVOID) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumProcessModules(hProcess: HANDLE, lphModule: [*]HMODULE, cb: DWORD, lpcbNeeded: *DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumProcessModulesEx(hProcess: HANDLE, lphModule: [*]HMODULE, cb: DWORD, lpcbNeeded: *DWORD, dwFilterFlag: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn EnumProcesses(lpidProcess: [*]DWORD, cb: DWORD, cbNeeded: *DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn GetDeviceDriverBaseNameA(ImageBase: LPVOID, lpBaseName: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetDeviceDriverBaseNameW(ImageBase: LPVOID, lpBaseName: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetDeviceDriverFileNameA(ImageBase: LPVOID, lpFilename: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetDeviceDriverFileNameW(ImageBase: LPVOID, lpFilename: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetMappedFileNameA(hProcess: HANDLE, lpv: ?LPVOID, lpFilename: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetMappedFileNameW(hProcess: HANDLE, lpv: ?LPVOID, lpFilename: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetModuleBaseNameA(hProcess: HANDLE, hModule: ?HMODULE, lpBaseName: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetModuleBaseNameW(hProcess: HANDLE, hModule: ?HMODULE, lpBaseName: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetModuleFileNameExA(hProcess: HANDLE, hModule: ?HMODULE, lpFilename: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetModuleFileNameExW(hProcess: HANDLE, hModule: ?HMODULE, lpFilename: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetModuleInformation(hProcess: HANDLE, hModule: HMODULE, lpmodinfo: *MODULEINFO, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn GetPerformanceInfo(pPerformanceInformation: *PERFORMANCE_INFORMATION, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn GetProcessImageFileNameA(hProcess: HANDLE, lpImageFileName: LPSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetProcessImageFileNameW(hProcess: HANDLE, lpImageFileName: LPWSTR, nSize: DWORD) callconv(WINAPI) DWORD;
-pub extern "psapi" fn GetProcessMemoryInfo(Process: HANDLE, ppsmemCounters: *PROCESS_MEMORY_COUNTERS, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn GetWsChanges(hProcess: HANDLE, lpWatchInfo: *PSAPI_WS_WATCH_INFORMATION, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn GetWsChangesEx(hProcess: HANDLE, lpWatchInfoEx: *PSAPI_WS_WATCH_INFORMATION_EX, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn InitializeProcessForWsWatch(hProcess: HANDLE) callconv(WINAPI) BOOL;
-pub extern "psapi" fn QueryWorkingSet(hProcess: HANDLE, pv: PVOID, cb: DWORD) callconv(WINAPI) BOOL;
-pub extern "psapi" fn QueryWorkingSetEx(hProcess: HANDLE, pv: PVOID, cb: DWORD) callconv(WINAPI) BOOL;
diff --git a/lib/std/os/windows/winmm.zig b/lib/std/os/windows/winmm.zig
deleted file mode 100644
index f21d4226e74a..000000000000
--- a/lib/std/os/windows/winmm.zig
+++ /dev/null
@@ -1,73 +0,0 @@
-const std = @import("../../std.zig");
-const windows = std.os.windows;
-const WINAPI = windows.WINAPI;
-const UINT = windows.UINT;
-const BYTE = windows.BYTE;
-const DWORD = windows.DWORD;
-
-pub const MMRESULT = UINT;
-pub const MMSYSERR_BASE = 0;
-pub const TIMERR_BASE = 96;
-pub const MMSYSERR_ERROR = MMSYSERR_BASE + 1;
-pub const MMSYSERR_BADDEVICEID = MMSYSERR_BASE + 2;
-pub const MMSYSERR_NOTENABLED = MMSYSERR_BASE + 3;
-pub const MMSYSERR_ALLOCATED = MMSYSERR_BASE + 4;
-pub const MMSYSERR_INVALHANDLE = MMSYSERR_BASE + 5;
-pub const MMSYSERR_NODRIVER = MMSYSERR_BASE + 6;
-pub const MMSYSERR_NOMEM = MMSYSERR_BASE + 7;
-pub const MMSYSERR_NOTSUPPORTED = MMSYSERR_BASE + 8;
-pub const MMSYSERR_BADERRNUM = MMSYSERR_BASE + 9;
-pub const MMSYSERR_INVALFLAG = MMSYSERR_BASE + 10;
-pub const MMSYSERR_INVALPARAM = MMSYSERR_BASE + 11;
-pub const MMSYSERR_HANDLEBUSY = MMSYSERR_BASE + 12;
-pub const MMSYSERR_INVALIDALIAS = MMSYSERR_BASE + 13;
-pub const MMSYSERR_BADDB = MMSYSERR_BASE + 14;
-pub const MMSYSERR_KEYNOTFOUND = MMSYSERR_BASE + 15;
-pub const MMSYSERR_READERROR = MMSYSERR_BASE + 16;
-pub const MMSYSERR_WRITEERROR = MMSYSERR_BASE + 17;
-pub const MMSYSERR_DELETEERROR = MMSYSERR_BASE + 18;
-pub const MMSYSERR_VALNOTFOUND = MMSYSERR_BASE + 19;
-pub const MMSYSERR_NODRIVERCB = MMSYSERR_BASE + 20;
-pub const MMSYSERR_MOREDATA = MMSYSERR_BASE + 21;
-pub const MMSYSERR_LASTERROR = MMSYSERR_BASE + 21;
-
-pub const MMTIME = extern struct {
-    wType: UINT,
-    u: extern union {
-        ms: DWORD,
-        sample: DWORD,
-        cb: DWORD,
-        ticks: DWORD,
-        smpte: extern struct {
-            hour: BYTE,
-            min: BYTE,
-            sec: BYTE,
-            frame: BYTE,
-            fps: BYTE,
-            dummy: BYTE,
-            pad: [2]BYTE,
-        },
-        midi: extern struct {
-            songptrpos: DWORD,
-        },
-    },
-};
-pub const LPMMTIME = *MMTIME;
-pub const TIME_MS = 0x0001;
-pub const TIME_SAMPLES = 0x0002;
-pub const TIME_BYTES = 0x0004;
-pub const TIME_SMPTE = 0x0008;
-pub const TIME_MIDI = 0x0010;
-pub const TIME_TICKS = 0x0020;
-
-// timeapi.h
-pub const TIMECAPS = extern struct { wPeriodMin: UINT, wPeriodMax: UINT };
-pub const LPTIMECAPS = *TIMECAPS;
-pub const TIMERR_NOERROR = 0;
-pub const TIMERR_NOCANDO = TIMERR_BASE + 1;
-pub const TIMERR_STRUCT = TIMERR_BASE + 33;
-pub extern "winmm" fn timeBeginPeriod(uPeriod: UINT) callconv(WINAPI) MMRESULT;
-pub extern "winmm" fn timeEndPeriod(uPeriod: UINT) callconv(WINAPI) MMRESULT;
-pub extern "winmm" fn timeGetDevCaps(ptc: LPTIMECAPS, cbtc: UINT) callconv(WINAPI) MMRESULT;
-pub extern "winmm" fn timeGetSystemTime(pmmt: LPMMTIME, cbmmt: UINT) callconv(WINAPI) MMRESULT;
-pub extern "winmm" fn timeGetTime() callconv(WINAPI) DWORD;