remove dst/rendertarget support for kARGB_4444_Config

src/opts/SkBlitRow_opts_arm.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkBlitRow_opts_arm_DEFINED
 #define SkBlitRow_opts_arm_DEFINED
 
 #include "SkBlitRow.h"
 #include "SkUtilsArm.h"
 
 // Define USE_NEON_CODE to indicate that we need to build NEON routines
 #define USE_NEON_CODE  (!SK_ARM_NEON_IS_NONE)
 
 // Define USE_ARM_CODE to indicate that we need to build ARM routines
 #define USE_ARM_CODE   (!SK_ARM_NEON_IS_ALWAYS)
 
 #if USE_NEON_CODE
 // These are defined in SkBlitRow_opts_arm_neon.cpp
 extern const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm_neon[];
-extern const SkBlitRow::Proc sk_blitrow_platform_4444_procs_arm_neon[];
 extern const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[];
 
 extern void Color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count,
                              SkPMColor color);
 #endif
 
 #if USE_ARM_CODE
 // These are defined in SkBlitRow_opts_arm.cpp
 extern const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm[];
-extern const SkBlitRow::Proc sk_blitrow_platform_4444_procs_arm[];
 extern const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm[];
 #endif
 
 // Defined in SkBlitRow_opts_arm.cpp, used in all cases.
 extern void S32A_Blend_BlitRow32_arm(SkPMColor* SK_RESTRICT dst,
                                      const SkPMColor* SK_RESTRICT src,
                                      int count, U8CPU alpha);
 
 #endif