[runtime] Remove unused %NumberUnaryMinus runtime function.

src/runtime/runtime.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_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/unicode.h"
@@ skipping 390 matching lines @@
   F(StringParseInt, 2, 1)              \
   F(StringParseFloat, 1, 1)            \
   F(NumberToString, 1, 1)              \
   F(NumberToStringSkipCache, 1, 1)     \
   F(NumberToInteger, 1, 1)             \
   F(NumberToIntegerMapMinusZero, 1, 1) \
   F(NumberToSmi, 1, 1)                 \
   F(NumberAdd, 2, 1)                   \
   F(NumberSub, 2, 1)                   \
   F(NumberMul, 2, 1)                   \
-  F(NumberUnaryMinus, 1, 1)            \
   F(NumberDiv, 2, 1)                   \
   F(NumberMod, 2, 1)                   \
   F(NumberImul, 2, 1)                  \
   F(NumberOr, 2, 1)                    \
   F(NumberAnd, 2, 1)                   \
   F(NumberXor, 2, 1)                   \
   F(NumberShl, 2, 1)                   \
   F(NumberShr, 2, 1)                   \
   F(NumberSar, 2, 1)                   \
   F(NumberEquals, 2, 1)                \
@@ skipping 822 matching lines @@
 inline bool Runtime::AtomicIsLockFree(uint32_t size) {
   return size == 1 || size == 2 || size == 4;
 }
 
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_