Remove the cos_mod table that has become unused after replacing the imdct by ff_imdct_half().
Remove the cos_mod table that has become unused after replacing the imdct
by ff_imdct_half().


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@15050 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg