Revert "Make --always-opt also optimize toplevel code."

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index b4ea4fbd9a61a0a3605dceff6d75ad1b90d41b85..be130f64175937a72c38020f510f5e791d3f7f06 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -200,11 +200,7 @@ bool LCodeGen::GeneratePrologue() {
     Comment(";;; Allocate local context");
     bool need_write_barrier = true;
     // Argument to NewContext is the function, which is in a1.
-    if (FLAG_harmony_scoping && info()->scope()->is_global_scope()) {
-      __ push(a1);
-      __ Push(info()->scope()->GetScopeInfo());
-      __ CallRuntime(Runtime::kNewGlobalContext, 2);
-    } else if (heap_slots <= FastNewContextStub::kMaximumSlots) {
+    if (heap_slots <= FastNewContextStub::kMaximumSlots) {
       FastNewContextStub stub(isolate(), heap_slots);
       __ CallStub(&stub);
       // Result of FastNewContextStub is always in new space.