build: remove cross-compilation support

These can be controlled by the user external to the project. Remove this
to simplify the rules.

Author: compnerd

CMakeLists.txt

@@ -18,15 +18,6 @@ if("${CMAKE_C_SIMULATE_ID}" STREQUAL "MSVC")
 endif()
 
 if(CMAKE_SYSTEM_NAME STREQUAL Windows)
-  if(NOT MINGW)
-    include(DispatchWindowsSupport)
-    dispatch_windows_arch_spelling(${CMAKE_SYSTEM_PROCESSOR} DISPATCH_MSVC_ARCH)
-    dispatch_windows_include_for_arch(${DISPATCH_MSVC_ARCH} DISPATCH_INCLUDES)
-    include_directories(BEFORE SYSTEM ${DISPATCH_INCLUDES})
-    dispatch_windows_lib_for_arch(${CMAKE_SYSTEM_PROCESSOR} DISPATCH_LIBDIR)
-    link_directories(${DISPATCH_LIBDIR})
-  endif()
-
   include(CheckCSourceCompiles)
   include(CheckSymbolExists)