Remove unnecessary check

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index 33848975e98e1461bb4e3e9fc7f2d58476bbc8a6..f27acf229adb47b0b30a5f82e628d7e907da4eef 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -323,8 +323,7 @@ static bool get_decode_info(SkImageInfo* decodeInfo, SkColorType canvasColorType
             *decodeInfo = decodeInfo->makeColorType(kIndex_8_SkColorType);
             break;
         case CodecSrc::kGrayscale_Always_DstColorType:
-            if (kRGB_565_SkColorType == canvasColorType ||
-                    kOpaque_SkAlphaType != decodeInfo->alphaType()) {
+            if (kRGB_565_SkColorType == canvasColorType) {
                 return false;
             }
             *decodeInfo = decodeInfo->makeColorType(kGray_8_SkColorType);