Remove the ASTContext parameter from the getBody() methods of Decl and subclasses.

Timings showed no significant difference before and after the commit.

llvm-svn: 74504
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 672f6da..c3f9364 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -226,7 +226,7 @@
   }
 
   // FIXME: Support CXXTryStmt here, too.
-  if (const CompoundStmt *S = FD->getCompoundBody(getContext())) {
+  if (const CompoundStmt *S = FD->getCompoundBody()) {
     StartFunction(FD, FD->getResultType(), Fn, Args, S->getLBracLoc());
     EmitStmt(S);
     FinishFunction(S->getRBracLoc());