Fix the CPU feature detection.

src/platform.h

Index: src/platform.h
diff --git a/src/platform.h b/src/platform.h
index 8b27c19a65f45d92cb8fdf2f52f0adad14715865..384ae15c96306a79a6916f871b054e376cfda10e 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -365,22 +365,10 @@ class OS {
   // Returns the double constant NAN
   static double nan_value();
 
-  // Support runtime detection of Cpu implementer
-  static CpuImplementer GetCpuImplementer();
-
-  // Support runtime detection of Cpu implementer
-  static CpuPart GetCpuPart(CpuImplementer implementer);
-
-  // Support runtime detection of VFP3 on ARM CPUs.
-  static bool ArmCpuHasFeature(CpuFeature feature);
-
   // Support runtime detection of whether the hard float option of the
   // EABI is used.
   static bool ArmUsingHardFloat();
 
-  // Support runtime detection of FPU on MIPS CPUs.
-  static bool MipsCpuHasFeature(CpuFeature feature);
-
   // Returns the activation frame alignment constraint or zero if
   // the platform doesn't care. Guaranteed to be a power of two.
   static int ActivationFrameAlignment();