mpg123: cleanup unused hunk after r25004

package/multimedia/mpg123/mpg123.mk

@@ -18,10 +18,6 @@ MPG123_USE_ALSA:=--with-audio=alsa
 MPG123_ALSA_DEP:=alsa-lib
 endif
 
-ifeq ($(BR2_PACKAGE_MPG123_ARM_UNROLL_FIX),y)
-MPG123_ARM_UNROLL_FIX:= -DMPG123_ARM_UNROLL_FIX
-endif
-
 $(DL_DIR)/$(MPG123_SOURCE):
 	$(call DOWNLOAD,$(MPG123_SITE),$(MPG123_SOURCE))