[regexp] Remove unused code

src/mips64/interface-descriptors-mips64.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_MIPS64
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 187 matching lines @@
 void ConstructTrampolineDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // a1: target
   // a3: new target
   // a0: number of arguments
   Register registers[] = {a1, a3, a0};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
-void RegExpConstructResultDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {a2, a1, a0};
-  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
-}
-
-
 void TransitionElementsKindDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {a0, a1};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
 
 void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // register state
@@ skipping 192 matching lines @@
       a1,  // the JSGeneratorObject to resume
       a2   // the resume mode (tagged)
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64