Fix build breakage, removed arguments twice instead of once.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 2001 matching lines @@
   const Function& target = Function::ZoneHandle(ic_data.GetTargetAt(0));
 
   const intptr_t kNumberOfArguments = 1;
   __ pushq(value_obj);
   compiler->GenerateStaticCall(instance_call()->deopt_id(),
                                instance_call()->token_pos(),
                                target,
                                kNumberOfArguments,
                                Array::Handle(),  // No argument names.
                                locs());
-  __ Drop(1);
   __ Bind(&done);
 }
 
 
 LocationSummary* PolymorphicInstanceCallInstr::MakeLocationSummary() const {
   return MakeCallSummary();
 }
 
 
 void PolymorphicInstanceCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
@@ skipping 222 matching lines @@
 
 void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64