fate: mp3: drop redundant CMP setting

Signed-off-by: Mans Rullgard <mans@mansr.com>

tests/fate/mp3.mak

 FATE_MP3 += fate-mp3-float-conf-compl
 fate-mp3-float-conf-compl: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/compl.bit
-fate-mp3-float-conf-compl: CMP = stddev
 fate-mp3-float-conf-compl: REF = $(SAMPLES)/mp3-conformance/compl.pcm
 
 FATE_MP3 += fate-mp3-float-conf-he_32khz
 fate-mp3-float-conf-he_32khz: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/he_32khz.bit -fs 343296
-fate-mp3-float-conf-he_32khz: CMP = stddev
 fate-mp3-float-conf-he_32khz: REF = $(SAMPLES)/mp3-conformance/he_32khz.pcm
 
 FATE_MP3 += fate-mp3-float-conf-he_44khz
 fate-mp3-float-conf-he_44khz: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/he_44khz.bit -fs 942336
-fate-mp3-float-conf-he_44khz: CMP = stddev
 fate-mp3-float-conf-he_44khz: REF = $(SAMPLES)/mp3-conformance/he_44khz.pcm
 
 FATE_MP3 += fate-mp3-float-conf-he_48khz
 fate-mp3-float-conf-he_48khz: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/he_48khz.bit -fs 343296
-fate-mp3-float-conf-he_48khz: CMP = stddev
 fate-mp3-float-conf-he_48khz: REF = $(SAMPLES)/mp3-conformance/he_48khz.pcm
 
 FATE_MP3 += fate-mp3-float-conf-hecommon
 fate-mp3-float-conf-hecommon: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/hecommon.bit -fs 133632
-fate-mp3-float-conf-hecommon: CMP = stddev
 fate-mp3-float-conf-hecommon: REF = $(SAMPLES)/mp3-conformance/hecommon.pcm
 
 FATE_MP3 += fate-mp3-float-conf-si
 fate-mp3-float-conf-si: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/si.bit -fs 269568
-fate-mp3-float-conf-si: CMP = stddev
 fate-mp3-float-conf-si: REF = $(SAMPLES)/mp3-conformance/si.pcm
 
 FATE_MP3 += fate-mp3-float-conf-si_block
 fate-mp3-float-conf-si_block: CMD = pcm -acodec mp3float -i $(SAMPLES)/mp3-conformance/si_block.bit -fs 145152
-fate-mp3-float-conf-si_block: CMP = stddev
 fate-mp3-float-conf-si_block: REF = $(SAMPLES)/mp3-conformance/si_block.pcm
 
 FATE_MP3 += fate-mp3-float-extra_overread
 fate-mp3-float-extra_overread: CMD = pcm -c:a mp3float -i $(SAMPLES)/mpegaudio/extra_overread.mp3
-fate-mp3-float-extra_overread: CMP = stddev
 fate-mp3-float-extra_overread: REF = $(SAMPLES)/mpegaudio/extra_overread.pcm
 
 FATE_SAMPLES_AVCONV += $(FATE_MP3)