Remove several JSFunction delegator functions.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index e893b2c492cd47ac8e7599535b6eb4fbe55dd1b4..d100894575d4c52c4cc2fb09602a20ba072e6239 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -6221,20 +6221,6 @@ bool SharedFunctionInfo::IsBuiltin() {
 bool SharedFunctionInfo::IsSubjectToDebugging() { return !IsBuiltin(); }
 
 
-bool JSFunction::IsBuiltin() { return shared()->IsBuiltin(); }
-
-
-bool JSFunction::IsSubjectToDebugging() {
-  return shared()->IsSubjectToDebugging();
-}
-
-
-bool JSFunction::NeedsArgumentsAdaption() {
-  return shared()->internal_formal_parameter_count() !=
-         SharedFunctionInfo::kDontAdaptArgumentsSentinel;
-}
-
-
 bool JSFunction::IsOptimized() {
   return code()->kind() == Code::OPTIMIZED_FUNCTION;
 }
@@ -6382,11 +6368,6 @@ bool JSFunction::is_compiled() {
 }
 
 
-bool JSFunction::has_simple_parameters() {
-  return shared()->has_simple_parameters();
-}
-
-
 LiteralsArray* JSFunction::literals() {
   DCHECK(!shared()->bound());
   return LiteralsArray::cast(literals_or_bindings());