Remove flag for no longer supported MSVC version

llvm-svn: 364218
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index 966a2b92..59e1bdb 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -361,10 +361,6 @@
 
   include(ChooseMSVCCRT)
 
-  if( MSVC11 )
-    add_definitions(-D_VARIADIC_MAX=10)
-  endif()
-
   # Add definitions that make MSVC much less annoying.
   add_definitions(
     # For some reason MS wants to deprecate a bunch of standard functions...