Revert "Detect cache line size on Linux for PPC hosts."

src/base/cpu.h

 // Copyright 2006-2013 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.
 
 // This module contains the architecture-specific code. This make the rest of
 // the code less dependent on differences between different processor
 // architecture.
 // The classes have the same definition for all architectures. The
 // implementation for a particular architecture is put in cpu_<arch>.cc.
 // The build system then uses the implementation for the target architecture.
@@ skipping 57 matching lines @@
     PPC_POWER6,
     PPC_POWER7,
     PPC_POWER8,
     PPC_G4,
     PPC_G5,
     PPC_PA6T
   };
 
   // General features
   bool has_fpu() const { return has_fpu_; }
-  int icache_line_size() const { return icache_line_size_; }
-  int dcache_line_size() const { return dcache_line_size_; }
-  static const int UNKNOWN_CACHE_LINE_SIZE = 0;
 
   // x86 features
   bool has_cmov() const { return has_cmov_; }
   bool has_sahf() const { return has_sahf_; }
   bool has_mmx() const { return has_mmx_; }
   bool has_sse() const { return has_sse_; }
   bool has_sse2() const { return has_sse2_; }
   bool has_sse3() const { return has_sse3_; }
   bool has_ssse3() const { return has_ssse3_; }
   bool has_sse41() const { return has_sse41_; }
@@ skipping 23 matching lines @@
   int stepping_;
   int model_;
   int ext_model_;
   int family_;
   int ext_family_;
   int type_;
   int implementer_;
   int architecture_;
   int variant_;
   int part_;
-  int icache_line_size_;
-  int dcache_line_size_;
   bool has_fpu_;
   bool has_cmov_;
   bool has_sahf_;
   bool has_mmx_;
   bool has_sse_;
   bool has_sse2_;
   bool has_sse3_;
   bool has_ssse3_;
   bool has_sse41_;
   bool has_sse42_;
@@ skipping 11 matching lines @@
   bool has_vfp_;
   bool has_vfp3_;
   bool has_vfp3_d32_;
   bool is_fp64_mode_;
 };
 
 }  // namespace base
 }  // namespace v8
 
 #endif  // V8_BASE_CPU_H_