revert useless patch that was supposed to fix DTS support (but the fix belongs...

revert useless patch that was supposed to fix DTS support (but the fix belongs to MPlayer, not FFmpeg)

Originally committed as revision 4652 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -240,7 +240,6 @@ EXTRALIBS += -L../libavutil -lavutil$(BUILDSUF)
 # currently using libdts for dts decoding
 ifeq ($(CONFIG_DTS),yes)
 OBJS+= dtsdec.o
-CFLAGS+= $(DTS_INC)
 endif
 
 ifeq ($(CONFIG_FAAD),yes)