MIPS: Remove dead code for inline string hashing.

src/mips64/code-stubs-mips64.h

 // Copyright 2011 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_MIPS_CODE_STUBS_ARM_H_
 #define V8_MIPS_CODE_STUBS_ARM_H_
 
 #include "src/code-stubs.h"
 
 
@@ skipping 10 matching lines @@
   // is allowed to spend extra time setting up conditions to make copying
   // faster. Copying of overlapping regions is not supported.
   // Dest register ends at the position after the last character written.
   static void GenerateCopyCharacters(MacroAssembler* masm,
                                      Register dest,
                                      Register src,
                                      Register count,
                                      Register scratch,
                                      String::Encoding encoding);
 
-  // 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);
-
   // Compare two flat ASCII strings and returns result in v0.
   static void GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
                                               Register left,
                                               Register right,
                                               Register scratch1,
                                               Register scratch2,
                                               Register scratch3,
                                               Register scratch4);
 
   // Compares two flat ASCII strings for equality and returns result in v0.
@@ skipping 361 matching lines @@
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   DISALLOW_COPY_AND_ASSIGN(NameDictionaryLookupStub);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_CODE_STUBS_ARM_H_