[runtime] Remove obsolete %ObjectEquals runtime entry.

src/crankshaft/hydrogen.cc

 // Copyright 2013 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.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 12558 matching lines @@
   CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
   HValue* index = Pop();
   HValue* string = Pop();
   HInstruction* char_code = BuildStringCharCodeAt(string, index);
   AddInstruction(char_code);
   HInstruction* result = NewUncasted<HStringCharFromCode>(char_code);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
-// Fast support for object equality testing.
-void HOptimizedGraphBuilder::GenerateObjectEquals(CallRuntime* call) {
-  DCHECK(call->arguments()->length() == 2);
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
-  HValue* right = Pop();
-  HValue* left = Pop();
-  HCompareObjectEqAndBranch* result =
-      New<HCompareObjectEqAndBranch>(left, right);
-  return ast_context()->ReturnControl(result, call->id());
-}
-
-
 // Fast support for SubString.
 void HOptimizedGraphBuilder::GenerateSubString(CallRuntime* call) {
   DCHECK_EQ(3, call->arguments()->length());
   CHECK_ALIVE(VisitExpressions(call->arguments()));
   PushArgumentsFromEnvironment(call->arguments()->length());
   HCallStub* result = New<HCallStub>(CodeStub::SubString, 3);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
@@ skipping 995 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8