Remove unnecessary CLEANFILES declaration. Test programs do not require it.

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@29038 b3059339-0415-0410-9bf9-f77b7e298cf2

Makefile

@@ -14,8 +14,6 @@ OBJS-$(HAVE_VIS)           +=  yuv2rgb_vis.o
 
 TESTS = cs_test swscale-example
 
-CLEANFILES = cs_test swscale-example
-
 include $(SUBDIR)../subdir.mak
 
 $(SUBDIR)cs_test: $(SUBDIR)cs_test.o $(SUBDIR)$(LIBNAME)