remove stall comment

llvm-svn: 90080
diff --git a/clang/lib/Lex/PPLexerChange.cpp b/clang/lib/Lex/PPLexerChange.cpp
index 41ed991..d5d6a6e 100644
--- a/clang/lib/Lex/PPLexerChange.cpp
+++ b/clang/lib/Lex/PPLexerChange.cpp
@@ -63,8 +63,7 @@
 //===----------------------------------------------------------------------===//
 
 /// EnterSourceFile - Add a source file to the top of the include stack and
-/// start lexing tokens from it instead of the current buffer.  Return true
-/// on failure.
+/// start lexing tokens from it instead of the current buffer.
 void Preprocessor::EnterSourceFile(FileID FID, const DirectoryLookup *CurDir) {
   assert(CurTokenLexer == 0 && "Cannot #include a file inside a macro!");
   ++NumEnteredSourceFiles;