Revert of Re-proc SkBlitRow::Color32 for ARM.

src/opts/SkBlitRow_opts_arm.cpp

Index: src/opts/SkBlitRow_opts_arm.cpp
diff --git a/src/opts/SkBlitRow_opts_arm.cpp b/src/opts/SkBlitRow_opts_arm.cpp
index 3dc99ce5b19084603f54970f188a16d146a76de5..9dd4b3b43df46e00cf93df4ec264757354dcdf22 100644
--- a/src/opts/SkBlitRow_opts_arm.cpp
+++ b/src/opts/SkBlitRow_opts_arm.cpp
@@ -390,7 +390,3 @@
     return SK_ARM_NEON_WRAP(sk_blitrow_platform_32_procs_arm)[flags];
 }
 
-SkBlitRow::Color32Proc SkBlitRow::PlatformColor32Proc() {
-    #define sk_blitrow_color32_arm NULL
-    return SK_ARM_NEON_WRAP(sk_blitrow_color32_arm);
-}