[regexp] Remove unused code

src/interface-descriptors.h

 // Copyright 2014 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.
 
 #ifndef V8_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include <memory>
 
 #include "src/assembler.h"
@@ skipping 31 matching lines @@
   V(CreateAllocationSite)                 \
   V(CreateWeakCell)                       \
   V(CallFunction)                         \
   V(CallFunctionWithFeedback)             \
   V(CallFunctionWithFeedbackAndVector)    \
   V(CallConstruct)                        \
   V(CallTrampoline)                       \
   V(ConstructStub)                        \
   V(ConstructTrampoline)                  \
   V(RegExpExec)                           \
-  V(RegExpConstructResult)                \
   V(CopyFastSmiOrObjectElements)          \
   V(TransitionElementsKind)               \
   V(AllocateHeapNumber)                   \
   V(AllocateFloat32x4)                    \
   V(AllocateInt32x4)                      \
   V(AllocateUint32x4)                     \
   V(AllocateBool32x4)                     \
   V(AllocateInt16x8)                      \
   V(AllocateUint16x8)                     \
   V(AllocateBool16x8)                     \
@@ skipping 501 matching lines @@
   DECLARE_DESCRIPTOR(CallConstructDescriptor, CallInterfaceDescriptor)
 };
 
 class RegExpExecDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kRegExpObject, kString, kPreviousIndex, kLastMatchInfo)
   DECLARE_DESCRIPTOR_WITH_STACK_ARGS(RegExpExecDescriptor,
                                      CallInterfaceDescriptor)
 };
 
-class RegExpConstructResultDescriptor : public CallInterfaceDescriptor {
- public:
-  DEFINE_PARAMETERS(kLength, kIndex, kInput)
-  DECLARE_DESCRIPTOR(RegExpConstructResultDescriptor, CallInterfaceDescriptor)
-};
-
 class CopyFastSmiOrObjectElementsDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kObject)
   DECLARE_DEFAULT_DESCRIPTOR(CopyFastSmiOrObjectElementsDescriptor,
                              CallInterfaceDescriptor, kParameterCount)
 };
 
 class TransitionElementsKindDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kObject, kMap)
@@ skipping 234 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_