[crankshaft] Remove the useless HAllocateBlockContext instruction.

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

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index 11422cf44bb622a22c77d2612f7bea19b916db7e..1d1a0764aef1348c5327dbc3893f192c42d58dff 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -5529,15 +5529,6 @@ void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
 }
 
 
-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