Remove leftover CONFIG_CHROMA_2X2 flags
Remove leftover CONFIG_CHROMA_2X2 flags

Fix build error due to leftover CONFIG_CHROMA_2X2 flags.

Change-Id: I25087494462e98c0bce5fadecb7634a7b38135bb

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom