Revert of Optimize RGB16 blitH functions with NEON for ARM platform.

src/core/SkBlitter_RGB16.cpp

Index: src/core/SkBlitter_RGB16.cpp
diff --git a/src/core/SkBlitter_RGB16.cpp b/src/core/SkBlitter_RGB16.cpp
index b481b27b571921f7deacb2bbec3579ea26af45ce..8caf90831231fdcc61cd6c166e193a9eab1ee281 100644
--- a/src/core/SkBlitter_RGB16.cpp
+++ b/src/core/SkBlitter_RGB16.cpp
@@ -25,10 +25,6 @@
 extern void SkRGB16BlitterBlitV_neon(uint16_t* device,
                                      int height,
                                      size_t deviceRB,
-                                     unsigned scale,
-                                     uint32_t src32);
-extern void SkRGB16BlitterBlitH_neon(uint16_t* device,
-                                     int width,
                                      unsigned scale,
                                      uint32_t src32);
 #else
@@ -342,14 +338,10 @@
                 uint32_t src32 = srcExpanded * scale5;
                 scale5 = 32 - scale5; // now we can use it on the device
                 int n = count;
-#if SK_ARM_NEON_IS_ALWAYS && defined(SK_CPU_LENDIAN)
-                SkRGB16BlitterBlitH_neon(device, n, scale5, src32);
-#else
                 do {
                     uint32_t dst32 = SkExpand_rgb_16(*device) * scale5;
                     *device++ = SkCompact_rgb_16((src32 + dst32) >> 5);
                 } while (--n != 0);
-#endif
                 goto DONE;
             }
         }
@@ -609,14 +601,10 @@
             unsigned scale5 = SkAlpha255To256(aa) * scale >> (8 + 3);
             uint32_t src32 =  srcExpanded * scale5;
             scale5 = 32 - scale5;
-#if SK_ARM_NEON_IS_ALWAYS && defined(SK_CPU_LENDIAN)
-            SkRGB16BlitterBlitH_neon(device, count, scale5, src32);
-#else
             do {
                 uint32_t dst32 = SkExpand_rgb_16(*device) * scale5;
                 *device++ = SkCompact_rgb_16((src32 + dst32) >> 5);
             } while (--count != 0);
-#endif
             continue;
         }
         device += count;