Remove the ANS rename on pack_mb_tokens().
Remove the ANS rename on pack_mb_tokens().

This fixes the ans+var_tx combination.

Change-Id: I4c34edb1deac4475c97ce1907c1d6bdf23ce3fc0

luctrudeau/aom,mbebenita/aom,mbebenita/aom,mbebenita/aom,mbebenita/aom,mbebenita/aom,luctrudeau/aom,smarter/aom,smarter/aom,smarter/aom,luctrudeau/aom,mbebenita/aom,luctrudeau/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom,GrokImageCompression/aom,luctrudeau/aom,smarter/aom,GrokImageCompression/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom