Revert "Windows: Add support for unicode command lines"

This is causing MinGW bots to fail.
This reverts commit r192069.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192070 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/modules/LLVM-Config.cmake b/cmake/modules/LLVM-Config.cmake
index e26fabd..9fa45ce 100644
--- a/cmake/modules/LLVM-Config.cmake
+++ b/cmake/modules/LLVM-Config.cmake
@@ -2,7 +2,7 @@
   # Returns in `return_var' a list of system libraries used by LLVM.
   if( NOT MSVC )
     if( MINGW )
-      set(system_libs ${system_libs} imagehlp psapi shell32)
+      set(system_libs ${system_libs} imagehlp psapi)
     elseif( CMAKE_HOST_UNIX )
       if( HAVE_LIBRT )
         set(system_libs ${system_libs} rt)