remove dst/rendertarget support for kARGB_4444_Config

src/opts/opts_check_SSE2.cpp

Index: src/opts/opts_check_SSE2.cpp
diff --git a/src/opts/opts_check_SSE2.cpp b/src/opts/opts_check_SSE2.cpp
index 6370058f0db7bfa4bab85af1e3604bca7651cfed..d23e3844d526c424b4135293e6c100fba976bcb2 100644
--- a/src/opts/opts_check_SSE2.cpp
+++ b/src/opts/opts_check_SSE2.cpp
@@ -152,10 +152,6 @@ static SkBlitRow::Proc32 platform_32_procs[] = {
     S32A_Blend_BlitRow32_SSE2,          // S32A_Blend,
 };
 
-SkBlitRow::Proc SkBlitRow::PlatformProcs4444(unsigned flags) {
-    return NULL;
-}
-
 SkBlitRow::Proc SkBlitRow::PlatformProcs565(unsigned flags) {
     return NULL;
 }