avutil/tests: remove float_dsp test

It's been ported to checkasm.
Signed-off-by: James Almer <jamrial@gmail.com>

libavutil/Makefile

@@ -202,7 +202,6 @@ TESTPROGS = adler32                                                     \
             eval                                                        \
             file                                                        \
             fifo                                                        \
-            float_dsp                                                   \
             hash                                                        \
             hmac                                                        \
             imgutils                                                    \

libavutil/tests/.gitignore

@@ -20,7 +20,6 @@
 /eval
 /fifo
 /file
-/float_dsp
 /hash
 /hmac
 /imgutils

tests/fate/libavutil.mak

@@ -83,12 +83,6 @@ FATE_LIBAVUTIL += fate-fifo
 fate-fifo: libavutil/tests/fifo$(EXESUF)
 fate-fifo: CMD = run libavutil/tests/fifo
 
-FATE_LIBAVUTIL += fate-float-dsp
-fate-float-dsp: libavutil/tests/float_dsp$(EXESUF)
-fate-float-dsp: CMD = run libavutil/tests/float_dsp $(CPUFLAGS:%=-c%)
-fate-float-dsp: CMP = null
-fate-float-dsp: REF = /dev/null
-
 FATE_LIBAVUTIL += fate-hash
 fate-hash: libavutil/tests/hash$(EXESUF)
 fate-hash: CMD = run libavutil/tests/hash