diff --git a/IlmBase/config.windows/IlmBaseConfig.h b/IlmBase/config.windows/IlmBaseConfig.h
deleted file mode 100644
index 87132606..00000000
--- a/IlmBase/config.windows/IlmBaseConfig.h
+++ /dev/null
@@ -1,21 +0,0 @@
-// Hand-crafted version of config/IlmBaseConfig.h for Windows
-//
-// Define and set to 1 if the target system has POSIX thread support
-// and you want IlmBase to use it for multithreaded file I/O.
-//
-
-#undef HAVE_PTHREAD
-
-//
-// Define and set to 1 if the target system supports POSIX semaphores
-// and you want OpenEXR to use them; otherwise, OpenEXR will use its
-// own semaphore implementation.
-//
-
-#undef HAVE_POSIX_SEMAPHORES
-
-// Required for system-specific debug trap code in IexBaseExc.cpp
-// and DLL export macros
-
-#define PLATFORM_WINDOWS 1
-
diff --git a/PyIlmBase/config.windows/PyIlmBaseConfig.h b/PyIlmBase/config.windows/PyIlmBaseConfig.h
deleted file mode 100644
index 6fa1a853..00000000
--- a/PyIlmBase/config.windows/PyIlmBaseConfig.h
+++ /dev/null
@@ -1,43 +0,0 @@
-//
-// This is a hard-coded config file for Windows platforms.  Don't
-// change any of these settings.
-//
-
-//
-// Define and set to 1 if the target system has POSIX thread support
-// and you want OpenEXR to use it for multithreaded file I/O.
-//
-
-/* #undef HAVE_PTHREAD */
-
-//
-// Define and set to 1 if the target system supports POSIX semaphores
-// and you want OpenEXR to use them; otherwise, OpenEXR will use its
-// own semaphore implementation.
-//
-
-/* #undef HAVE_POSIX_SEMAPHORES */
-
-//
-// Define and set to 1 if the target system is a Darwin-based system
-// (e.g., OS X).
-//
-
-/* #undef HAVE_DARWIN */
-
-//
-// Define and set to 1 if the target system supports a proc filesystem
-// compatible with the Linux kernel's proc filesystem.  Note that this
-// is only used by a program in the IlmImfTest test suite, it's not
-// used by any OpenEXR library or application code.
-//
-
-/* #undef HAVE_LINUX_PROCFS */
-
-//
-// Define and set to 1 if the target system has a complete <iomanip>
-// implementation, specifically if it supports the std::right
-// formatter.
-//
-
-#define HAVE_COMPLETE_IOMANIP 1
diff --git a/cmake/FindNumPy.cmake b/cmake/FindNumPy.cmake
deleted file mode 100644
index ed2d4343..00000000
--- a/cmake/FindNumPy.cmake
+++ /dev/null
@@ -1,51 +0,0 @@
-
-
-if(NOT PYTHON_EXECUTABLE)
-  find_package(PythonInterp QUIET)
-endif()
-
-if (PYTHON_EXECUTABLE)
-  # Find out the include path
-  execute_process(
-    COMMAND "${PYTHON_EXECUTABLE}" -c
-    "from __future__ import print_function\ntry: import numpy; print(numpy.get_include(), end='')\nexcept:pass\n"
-    RESULT_VARIABLE _NUMPY_RESULT
-    OUTPUT_VARIABLE py_ilmbase_numpy_path
-    OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-  if(NOT _NUMPY_RESULT MATCHES 0)
-    set(NumPy_FOUND 0 CACHE INTERNAL "Python numpy not found")
-    return()
-  endif()
-
-  # And the version
-  execute_process(
-    COMMAND "${PYTHON_EXECUTABLE}" -c
-    "from __future__ import print_function\ntry: import numpy; print(numpy.__version__, end='')\nexcept:pass\n"
-    RESULT_VARIABLE _NUMPY_RESULT
-    OUTPUT_VARIABLE py_ilmbase_numpy_version
-    OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-  if(NOT _NUMPY_RESULT MATCHES 0)
-    set(NumPy_FOUND 0 CACHE INTERNAL "Python numpy not found")
-    return()
-  endif()
-
-  find_path(NUMPY_INCLUDE_DIRS numpy/arrayobject.h
-    HINTS "${py_ilmbase_numpy_path}" "${PYTHON_INCLUDE_PATH}" NO_DEFAULT_PATH)
-
-  if(NUMPY_INCLUDE_DIRS)
-    set(NumPy_FOUND 1 CACHE INTERNAL "Python numpy found")
-
-    include(FindPackageHandleStandardArgs)
-    find_package_handle_standard_args(NumPy REQUIRED_VARS NUMPY_INCLUDE_DIRS
-      VERSION_VAR py_ilmbase_numpy_version)
-  else()
-    set(NumPy_FOUND 0 CACHE INTERNAL "Python numpy not found")
-    message(WARNING "Numpy not found, PyImathNumpy will not be built")
-  endif()
-
-else ()
-  message(WARNING "Numpy not found, PyImathNumpy will not be built")
-  set(NumPy_FOUND 0 CACHE INTERNAL "Python numpy not found")
-endif()