Revert "guess flutter#2"

This reverts commit 426927e.

Author: brandon-bethke-timu

skia/BUILD.gn

@@ -638,7 +638,7 @@ skia_component("skia") {
   sources += skia_effects_sources
   sources += skia_colorfilters_sources
   sources += skia_effects_imagefilter_sources
-  sources += skia_codec_shared
+  sources += skia_codec_core
   sources += skia_codec_decode_bmp
   sources += skia_encode_srcs
   sources += skia_sksl_core_sources