[regexp] Remove unused code

src/crankshaft/hydrogen.h

 // 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.
 
 #ifndef V8_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 1399 matching lines @@
   HValue* BuildToNumber(HValue* input);
   HValue* BuildToObject(HValue* receiver);
 
   HValue* BuildUncheckedDictionaryElementLoad(HValue* receiver,
                                               HValue* elements, HValue* key,
                                               HValue* hash);
 
   // ES6 section 7.4.7 CreateIterResultObject ( value, done )
   HValue* BuildCreateIterResultObject(HValue* value, HValue* done);
 
-  HValue* BuildRegExpConstructResult(HValue* length,
-                                     HValue* index,
-                                     HValue* input);
-
   // Allocates a new object according with the given allocation properties.
   HAllocate* BuildAllocate(HValue* object_size,
                            HType type,
                            InstanceType instance_type,
                            HAllocationMode allocation_mode);
   // Computes the sum of two string lengths, taking care of overflow handling.
   HValue* BuildAddStringLengths(HValue* left_length, HValue* right_length);
   // Creates a cons string using the two input strings.
   HValue* BuildCreateConsString(HValue* length,
                                 HValue* left,
@@ skipping 761 matching lines @@
   F(ToInteger)                         \
   F(ToObject)                          \
   F(ToString)                          \
   F(ToLength)                          \
   F(ToNumber)                          \
   F(IsJSReceiver)                      \
   F(DebugBreakInOptimizedCode)         \
   F(StringCharCodeAt)                  \
   F(SubString)                         \
   F(RegExpExec)                        \
-  F(RegExpConstructResult)             \
-  F(RegExpFlags)                       \
-  F(RegExpSource)                      \
   F(NumberToString)                    \
   F(DebugIsActive)                     \
   /* Typed Arrays */                   \
   F(TypedArrayInitialize)              \
   F(MaxSmi)                            \
   F(TypedArrayMaxSizeInHeap)           \
   F(ArrayBufferViewGetByteLength)      \
   F(ArrayBufferViewGetByteOffset)      \
   F(TypedArrayGetLength)               \
   /* ArrayBuffer */                    \
@@ skipping 795 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_