Unbreak CMake build: remove not-yet-committed CommentLexer.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158777 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Comments/CMakeLists.txt b/lib/Comments/CMakeLists.txt
index f9561c6..db4ca73 100644
--- a/lib/Comments/CMakeLists.txt
+++ b/lib/Comments/CMakeLists.txt
@@ -1,7 +1,6 @@
 set(LLVM_USED_LIBS clangBasic clangAST clangLex)
 
 add_clang_library(clangComments
-  CommentLexer.cpp
   RawCommentList.cpp
   )