Remove V8_WARN_UNUSED_RESULT for simple getters.

src/cpu.h

 // Copyright 2006-2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 82 matching lines @@
 
   // arm features
   bool has_idiva() const { return has_idiva_; }
   bool has_neon() const { return has_neon_; }
   bool has_thumbee() const { return has_thumbee_; }
   bool has_vfp() const { return has_vfp_; }
   bool has_vfp3() const { return has_vfp3_; }
   bool has_vfp3_d32() const { return has_vfp3_d32_; }
 
   // Returns the number of processors online.
-  static int NumberOfProcessorsOnline() V8_WARN_UNUSED_RESULT;
+  static int NumberOfProcessorsOnline();
 
   // Initializes the cpu architecture support. Called once at VM startup.
   static void SetUp();
 
   static bool SupportsCrankshaft();
 
   // Flush instruction cache.
   static void FlushICache(void* start, size_t size);
 
  private:
@@ skipping 21 matching lines @@
   bool has_neon_;
   bool has_thumbee_;
   bool has_vfp_;
   bool has_vfp3_;
   bool has_vfp3_d32_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CPU_H_