[runtime] Kill the %NumberToIntegerMapMinusZero runtime entry.

src/full-codegen/ppc/full-codegen-ppc.cc

 // 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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 2914 matching lines @@
   Register object = r4;
   Register index = r3;
   Register result = r6;
 
   PopOperand(object);
 
   Label need_conversion;
   Label index_out_of_range;
   Label done;
   StringCharCodeAtGenerator generator(object, index, result, &need_conversion,
-                                      &need_conversion, &index_out_of_range,
-                                      STRING_INDEX_IS_NUMBER);
+                                      &need_conversion, &index_out_of_range);
   generator.GenerateFast(masm_);
   __ b(&done);
 
   __ bind(&index_out_of_range);
   // When the index is out of range, the spec requires us to return
   // NaN.
   __ LoadRoot(result, Heap::kNanValueRootIndex);
   __ b(&done);
 
   __ bind(&need_conversion);
@@ skipping 858 matching lines @@
 
   DCHECK(Assembler::IsCrSet(Assembler::instr_at(cmp_address)));
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_PPC