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

src/opts/SkBlitMask_opts_arm_neon.cpp

Index: src/opts/SkBlitMask_opts_arm_neon.cpp
diff --git a/src/opts/SkBlitMask_opts_arm_neon.cpp b/src/opts/SkBlitMask_opts_arm_neon.cpp
index 370780c210bf6c68dc2d91692afb2bc8cbee1c44..3361a5d19dd777191700bbe8f4f6111ddb7c1d7a 100644
--- a/src/opts/SkBlitMask_opts_arm_neon.cpp
+++ b/src/opts/SkBlitMask_opts_arm_neon.cpp
@@ -332,48 +332,3 @@
 
 #undef LOAD_LANE_16
 #undef STORE_LANE_16
-
-void SkRGB16BlitterBlitH_neon(uint16_t* device,
-                              int width,
-                              unsigned scale,
-                              uint32_t src32) {
-    if (width >= 8) {
-        // prepare constants
-        uint16x8_t vdev = vdupq_n_u16(0);
-        uint16x8_t vmaskq_g16 = vdupq_n_u16(SK_G16_MASK_IN_PLACE);
-        uint16x8_t vmaskq_ng16 = vdupq_n_u16(~SK_G16_MASK_IN_PLACE);
-        uint32x4_t vsrc32 = vdupq_n_u32(src32);
-        uint32x4_t vscale5 = vdupq_n_u32((uint32_t)scale);
-
-        while (width >= 8) {
-            vdev = vld1q_u16(device);
-
-            // Expand_rgb_16
-            uint16x8x2_t vdst = vzipq_u16((vdev & vmaskq_ng16), (vdev & vmaskq_g16));
-            uint32x4_t vdst32_lo = vmulq_u32(vreinterpretq_u32_u16(vdst.val[0]), vscale5);
-            uint32x4_t vdst32_hi = vmulq_u32(vreinterpretq_u32_u16(vdst.val[1]), vscale5);
-
-            // Compact_rgb_16
-            vdst32_lo = vaddq_u32(vdst32_lo, vsrc32);
-            vdst32_hi = vaddq_u32(vdst32_hi, vsrc32);
-            vdst32_lo = vshrq_n_u32(vdst32_lo, 5);
-            vdst32_hi = vshrq_n_u32(vdst32_hi, 5);
-
-            uint16x4_t vtmp_lo = vmovn_u32(vdst32_lo) & vget_low_u16(vmaskq_ng16);
-            uint16x4_t vtmp_hi = vshrn_n_u32(vdst32_lo, 16) & vget_low_u16(vmaskq_g16);
-            uint16x4_t vdst16_lo = vorr_u16(vtmp_lo, vtmp_hi);
-            vtmp_lo = vmovn_u32(vdst32_hi) & vget_low_u16(vmaskq_ng16);
-            vtmp_hi = vshrn_n_u32(vdst32_hi, 16) & vget_low_u16(vmaskq_g16);
-            uint16x4_t vdst16_hi = vorr_u16(vtmp_lo, vtmp_hi);
-
-            vst1q_u16(device, vcombine_u16(vdst16_lo, vdst16_hi));
-            device += 8;
-            width -= 8;
-        }
-    }
-    while (width != 0) {
-        uint32_t dst32 = SkExpand_rgb_16(*device) * scale;
-        *device++ = SkCompact_rgb_16((src32 + dst32) >> 5);
-        width--;
-    }
-}