[crankshaft] Remove the useless HAllocateBlockContext instruction.

src/crankshaft/x87/lithium-codegen-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/crankshaft/x87/lithium-codegen-x87.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 5942 matching lines @@
   __ bind(&done);
 }
 
 
 void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
   Register context = ToRegister(instr->context());
   __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context);
 }
 
 
-void LCodeGen::DoAllocateBlockContext(LAllocateBlockContext* instr) {
-  Handle<ScopeInfo> scope_info = instr->scope_info();
-  __ Push(scope_info);
-  __ push(ToRegister(instr->function()));
-  CallRuntime(Runtime::kPushBlockContext, instr);
-  RecordSafepoint(Safepoint::kNoLazyDeopt);
-}
-
-
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87