Remove an unreachable if branch in select_tx_block()
Remove an unreachable if branch in select_tx_block()

Change-Id: Ia2b6b02fd85558723e4ba0a93c7f33189db70eaa

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