[turbofan] Remove language mode from JSCall operator.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index ba266ddce2a09408cdfeb4dc77825d88379e835a..1399cfa53a82ddcaaef1dfd1964ea9406f0a9190 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -2483,9 +2483,8 @@ void AstGraphBuilder::VisitCall(Call* expr) {
 
   // Create node to perform the function call.
   VectorSlotPair feedback = CreateVectorSlotPair(expr->CallFeedbackICSlot());
-  const Operator* call =
-      javascript()->CallFunction(args->length() + 2, language_mode(), feedback,
-                                 receiver_hint, expr->tail_call_mode());
+  const Operator* call = javascript()->CallFunction(
+      args->length() + 2, feedback, receiver_hint, expr->tail_call_mode());
   FrameStateBeforeAndAfter states(this, expr->CallId());
   Node* value = ProcessArguments(call, args->length() + 2);
   environment()->Push(value->InputAt(0));  // The callee passed to the call.
@@ -2563,8 +2562,7 @@ void AstGraphBuilder::VisitCallJSRuntime(CallRuntime* expr) {
   VisitForValues(args);
 
   // Create node to perform the JS runtime call.
-  const Operator* call =
-      javascript()->CallFunction(args->length() + 2, language_mode());
+  const Operator* call = javascript()->CallFunction(args->length() + 2);
   FrameStateBeforeAndAfter states(this, expr->CallId());
   Node* value = ProcessArguments(call, args->length() + 2);
   states.AddToNode(value, expr->id(), ast_context()->GetStateCombine());