Revert "[clang] Adding CharacteristicKind to PPCallbacks::InclusionDirective"

This reverts commit r331904 because of a memory leak.

llvm-svn: 331932
diff --git a/clang/lib/Lex/PreprocessingRecord.cpp b/clang/lib/Lex/PreprocessingRecord.cpp
index b598200..5537479 100644
--- a/clang/lib/Lex/PreprocessingRecord.cpp
+++ b/clang/lib/Lex/PreprocessingRecord.cpp
@@ -471,8 +471,7 @@
     const FileEntry *File,
     StringRef SearchPath,
     StringRef RelativePath,
-    const Module *Imported, 
-    SrcMgr::CharacteristicKind FileType) {
+    const Module *Imported) {
   InclusionDirective::InclusionKind Kind = InclusionDirective::Include;
   
   switch (IncludeTok.getIdentifierInfo()->getPPKeywordID()) {