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The MMX requantize functions have the MMX permutation (i.e. FF_IDCT_PERM_SIMPLE) hardcoded and therefore check for the used permutation (namely via a CRC). Yet this is very ugly and could even lead to misdetection; furthermore, sinced7246ea9f2the permutation used here is de-facto and sincebfb28b5ce8definitely impossible on x64, making this code dead on x64. So remove it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>