build: Eliminate obsolete test targets.

The targets are now part of FATE and can be run as individual FATE targets.

Makefile

@@ -185,8 +185,6 @@ distclean::
 config:
 	$(SRC_PATH)/configure $(value LIBAV_CONFIGURATION)
 
-check: test checkheaders
-
 include $(SRC_PATH)/doc/Makefile
 include $(SRC_PATH)/tests/Makefile
 

tests/Makefile

-fulltest test: codectest lavftest lavfitest seektest
-
 FFSERVER_REFFILE = $(SRC_PATH)/tests/ffserver.regression.ref
 
-codectest: fate-codec
-lavftest:  fate-lavf
-lavfitest: fate-lavfi
-seektest:  fate-seek
-
 AREF = fate-acodec-aref
 VREF = fate-vsynth1-vref fate-vsynth2-vref
 REFS = $(AREF) $(VREF)
@@ -120,4 +113,4 @@ testclean:
 
 -include $(wildcard tests/*.d)
 
-.PHONY: fate* *test
+.PHONY: fate*