More #include cleaning

- Kill unnecessary #includes in .cpp files. This is an automatic
   sweep so some things removed are actually used, but happen to be
   included by a previous header. I tried to get rid of the obvious
   examples and this was the easiest way to trim the #includes in one
   fell swoop.
 - We now return to regularly scheduled development.

llvm-svn: 54632

clang/lib/CodeGen/CodeGenModule.cpp

@@ -15,20 +15,15 @@
 #include "CodeGenModule.h"
 #include "CodeGenFunction.h"
 #include "clang/AST/ASTContext.h"
-#include "clang/AST/Decl.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/Basic/Diagnostic.h"
-#include "clang/Basic/LangOptions.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/CallingConv.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
 #include "llvm/Module.h"
 #include "llvm/Intrinsics.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Analysis/Verifier.h"
-#include <algorithm>
 using namespace clang;
 using namespace CodeGen;