Remove unnecessary setting of variables
Remove unnecessary setting of variables

Do not set the values of the members of the structure MB_MODE_INFO
in the function 'av1_build_intra_predictors_for_interintra'. This
would cause thread sanitizer issues with row based multi-threading
of decoding stage.

Change-Id: I47a520f9918644fce0299003c0574798fd17da0b

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