Remove unnecessary ASTContext parameter from FunctionDecl::isBuiltinID

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81590 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index fb79f4d..fa020de 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -325,7 +325,7 @@
   if (!FDecl->getIdentifier())
     return 0;
 
-  return FDecl->getBuiltinID(Context);
+  return FDecl->getBuiltinID();
 }
 
 QualType CallExpr::getCallReturnType() const {