Remove dead code for inline string hashing.

src/arm64/code-stubs-arm64.h

 // 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.
 
 #ifndef V8_ARM64_CODE_STUBS_ARM64_H_
 #define V8_ARM64_CODE_STUBS_ARM64_H_
 
 #include "src/code-stubs.h"
 
 namespace v8 {
 namespace internal {
 
 
 void ArrayNativeCode(MacroAssembler* masm, Label* call_generic_code);
 
 
 class StringHelper : public AllStatic {
  public:
-  // TODO(all): These don't seem to be used any more. Delete them.
-
-  // Generate string hash.
-  static void GenerateHashInit(MacroAssembler* masm,
-                               Register hash,
-                               Register character);
-
-  static void GenerateHashAddCharacter(MacroAssembler* masm,
-                                       Register hash,
-                                       Register character);
-
-  static void GenerateHashGetHash(MacroAssembler* masm,
-                                  Register hash,
-                                  Register scratch);
-
   // Compares two flat ASCII strings and returns result in x0.
   static void GenerateCompareFlatAsciiStrings(
       MacroAssembler* masm, Register left, Register right, Register scratch1,
       Register scratch2, Register scratch3, Register scratch4);
 
   // Compare two flat ASCII strings for equality and returns result in x0.
   static void GenerateFlatAsciiStringEquals(MacroAssembler* masm, Register left,
                                             Register right, Register scratch1,
                                             Register scratch2,
                                             Register scratch3);
@@ skipping 358 matching lines @@
   LookupMode mode() const { return LookupModeBits::decode(minor_key_); }
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   DISALLOW_COPY_AND_ASSIGN(NameDictionaryLookupStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_CODE_STUBS_ARM64_H_