libclang/CMakeLists.txt: Prune IndexingContext.h out of ADDITIONAL_HEADERS. VS IDE uses it.

llvm-svn: 260802
GitOrigin-RevId: 93e0200e23a3e4c085836a6b49ad947eab6352f4

tools/libclang/CMakeLists.txt

diff --git a/tools/libclang/CMakeLists.txt b/tools/libclang/CMakeLists.txt
index d893b5e..741e02a 100644
--- a/tools/libclang/CMakeLists.txt
+++ b/tools/libclang/CMakeLists.txt
@@ -30,7 +30,6 @@
   CXTranslationUnit.h
   CXType.h
   Index_Internal.h
-  IndexingContext.h
   ../../include/clang-c/Index.h
   )