Missed a forward declaration.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90035 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Analysis/PathDiagnostic.h

@@ -24,7 +24,6 @@
 namespace clang {
 
 class Decl;
-class Preprocessor;
 class SourceManager;
 class Stmt;
 

include/clang/Frontend/PathDiagnosticClients.h

@@ -14,9 +14,7 @@
 #ifndef LLVM_CLANG_FRONTEND_PATH_DIAGNOSTIC_CLIENTS_H
 #define LLVM_CLANG_FRONTEND_PATH_DIAGNOSTIC_CLiENTS_H
 
-#include <memory>
 #include <string>
-#include "llvm/ADT/SmallVector.h"
 
 namespace clang {