[Preprocessor] Remove PPMutationListener.

It's not used anymore.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178106 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 19 deletions

diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index dafa497214..7a912ec0f8 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -21,7 +21,6 @@
 #include "clang/Lex/Lexer.h"
 #include "clang/Lex/MacroInfo.h"
 #include "clang/Lex/PPCallbacks.h"
-#include "clang/Lex/PPMutationListener.h"
 #include "clang/Lex/PTHLexer.h"
 #include "clang/Lex/PTHManager.h"
 #include "clang/Lex/TokenLexer.h"
@@ -296,11 +295,6 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   /// encountered (e.g. a file is \#included, etc).
   PPCallbacks *Callbacks;
 
-  /// \brief Listener whose actions are invoked when an entity in the
-  /// preprocessor (e.g., a macro) that was loaded from an AST file is
-  /// later mutated.
-  PPMutationListener *Listener;
-
   struct MacroExpandsInfo {
     Token Tok;
     MacroDirective *MD;
@@ -519,19 +513,6 @@ public:
     Callbacks = C;
   }
 
-  /// \brief Attach an preprocessor mutation listener to the preprocessor.
-  ///
-  /// The preprocessor mutation listener provides the ability to track
-  /// modifications to the preprocessor entities committed after they were
-  /// initially created.
-  void setPPMutationListener(PPMutationListener *Listener) {
-    this->Listener = Listener;
-  }
-
-  /// \brief Retrieve a pointer to the preprocessor mutation listener
-  /// associated with this preprocessor, if any.
-  PPMutationListener *getPPMutationListener() const { return Listener; }
-
   /// \brief Given an identifier, return its latest MacroDirective if it is
   // \#defined or null if it isn't \#define'd.
   MacroDirective *getMacroDirective(IdentifierInfo *II) const {