patch 8.2.4213: too much code for supporting old MSVC versions

Problem:    Too much code for supporting old MSVC versions.
Solution:   Remove MSVC 2003 support. (Ken Takata, closes #9623)

Filelist

@@ -543,7 +543,6 @@ SRC_DOS =	\
 		tools/rename.bat \
 		src/bigvim.bat \
 		src/bigvim64.bat \
-		src/msvcsetup.bat \
 		src/msvc2008.bat \
 		src/msvc2010.bat \
 		src/msvc2015.bat \

src/INSTALLpc.txt

@@ -155,83 +155,8 @@ OLDER VERSIONS
 The minimal supported version is Windows XP. Building with older compilers
 might still work, but these instructions might be outdated.
 
-If you need the executable to run on Windows 98 or ME, use the 2003 one
-|msvc-2003-toolkit| or |msvc-2005-express|, and use the source code before
-8.0.0029.
-
-Visual C++ Toolkit 2003				*msvc-2003-toolkit*
------------------------
-
-NOTE: this most likely does not work
-
-You could download the Microsoft Visual C++ Toolkit 2003 from
-    http://msdn.microsoft.com/visualc/vctoolkit2003/
-Unfortunately this URL is no longer valid.  Unofficial downloads appear to be
-available from links mentioned on these pages (use at your own risk):
-   http://www.filewatcher.com/m/VCToolkitSetup.exe.32952488.0.0.html
-   http://feargame.net/wiki/index.php?title=Building_Source_with_the_VC2003_Toolkit
-
-This contains the command-line tools (compiler, linker, CRT headers,
-and libraries) for Visual Studio .NET 2003, but not the Visual Studio IDE.
-To compile and debug Vim with the VC2003 Toolkit, you will also need
-|ms-platform-sdk|, |dotnet-1.1-redist|, |dotnet-1.1-sdk|,
-and |windbg-download|.
-
-It's easier to download Visual C++ 2008 Express Edition, |msvc-2008-express|,
-which is freely available in perpetuity.
-
-The free Code::Blocks IDE works with the VC2003 Toolkit, as described at
-    http://wiki.codeblocks.org/index.php?title=Integrating_Microsoft_Visual_Toolkit_2003_with_Code::Blocks_IDE
-(This site also takes you through configuring a number of other
-free C compilers for Win32.)
-
-To compile Vim using the VC2003 Toolkit and Make_mvc.mak, you must first
-execute the following commands in a cmd.exe window (the msvcsetup.bat batch
-file can be used):
-
-    set PATH=%SystemRoot%\Microsoft.NET\Framework\v1.1.4322;%PATH%
-    call "%VCToolkitInstallDir%vcvars32.bat"
-    set MSVCVer=7.1
-    call "%ProgramFiles%\Microsoft Platform SDK\SetEnv.Cmd"
-    set LIB=%ProgramFiles%\Microsoft Visual Studio .NET 2003\Vc7\lib;%LIB%
-
-Now you can build Vim with Make_mvc.mak.
-
-
-Getting the Windows Platform SDK	    *ms-platform-sdk*
-
-You will also need a copy of the Windows Platform SDK.  Specifically, you need
-the Windows Core SDK subset of the Platform SDK, which contains the Windows
-headers and libraries.  You need to search for it, Microsoft keeps changing
-the URL.
-
-
-Getting the .NET Framework 1.1 Runtime      *dotnet-1.1-redist*
-
-You need the .NET Framework 1.1 Redistributable Package from
-    http://www.microsoft.com/downloads/details.aspx?familyid=262d25e3-f589-4842-8157-034d1e7cf3a3
-or from Windows Update:
-    http://windowsupdate.microsoft.com/
-This is needed to install |dotnet-1.1-sdk|. It also contains cvtres.exe,
-which is needed to link Vim.
-
-
-Getting the .NET Framework 1.1 SDK	    *dotnet-1.1-sdk*
-
-You need the .NET Framework 1.1 SDK from
-    http://www.microsoft.com/downloads/details.aspx?familyid=9b3a2ca6-3647-4070-9f41-a333c6b9181d
-This contains some additional libraries needed to compile Vim,
-such as msvcrt.lib. You must install |dotnet-1.1-redist| before
-installing the .NET 1.1 SDK.
-
-
-Getting the WinDbg debugger		    *windbg-download*
-
-The Debugging Tools for Windows can be downloaded from
-    http://www.microsoft.com/whdc/devtools/debugging/default.mspx
-This includes the WinDbg debugger, which you will want if you ever need
-to debug Vim itself. An earlier version of the Debugging Tools
-is also available through the Platform SDK, |ms-platform-sdk|.
+If you need the executable to run on Windows 98 or ME, use the 2005 one
+|msvc-2005-express|, and use the source code before 8.0.0029.
 
 
 Visual C++ 2005 Express Edition       *msvc-2005-express*

src/Make_mvc.mak

@@ -305,10 +305,6 @@ MSVCRT_NAME = msvcr$(MSVCRT_VER)
 MSVCRT_NAME = vcruntime$(MSVCRT_VER)
 !endif
 
-!if $(MSVC_MAJOR) == 6
-CPU = ix86
-!endif
-
 ### Set the default $(WINVER) to make it work with VC++7.0 (VS.NET)
 !ifndef WINVER
 WINVER = 0x0501
@@ -707,8 +703,8 @@ RCFLAGS = $(rcflags) $(rcvars) -DNDEBUG
 CFLAGS = $(CFLAGS) /MD
 LIBC = msvcrt.lib
 ! else
-LIBC = libcmt.lib
 CFLAGS = $(CFLAGS) /Zl /MT
+LIBC = libcmt.lib
 ! endif
 
 !else  # DEBUG
@@ -719,18 +715,14 @@ DEBUGINFO = /ZI
 ! endif
 CFLAGS = $(CFLAGS) -D_DEBUG -DDEBUG /Od
 RCFLAGS = $(rcflags) $(rcvars) -D_DEBUG -DDEBUG
-# The /fixed:no is needed for Quantify. Assume not 4.? as unsupported in VC4.0.
-! if $(MSVC_MAJOR) == 4
-LIBC =
-! else
+# The /fixed:no is needed for Quantify.
 LIBC = /fixed:no
-! endif
 ! ifdef USE_MSVCRT
 CFLAGS = $(CFLAGS) /MDd
 LIBC = $(LIBC) msvcrtd.lib
 ! else
-LIBC = $(LIBC) libcmtd.lib
 CFLAGS = $(CFLAGS) /Zl /MTd
+LIBC = $(LIBC) libcmtd.lib
 ! endif
 
 !endif # DEBUG
@@ -799,7 +791,7 @@ OBJ = \
 	$(OUTDIR)\hashtab.obj \
 	$(OUTDIR)\help.obj \
 	$(OUTDIR)\highlight.obj \
-	$(OBJDIR)\if_cscope.obj \
+	$(OUTDIR)\if_cscope.obj \
 	$(OUTDIR)\indent.obj \
 	$(OUTDIR)\insexpand.obj \
 	$(OUTDIR)\json.obj \