package/sox: drop unrecognized options

ffmpeg has been dropped since version 14.4.2 (back in 2013) and
https://sourceforge.net/p/sox/code/ci/5ae4049727d4f29036ad541bde5863c850aa7755

--disable-gomp has also been removed since version 14.4.1 (back in 2012)
and
https://sourceforge.net/p/sox/code/ci/84eaacb54fd2e61154ccd95328d8a8ec5096eae1

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/sox/sox.mk

@@ -15,8 +15,6 @@ SOX_CPE_ID_PRODUCT = sound_exchange
 
 SOX_CONF_OPTS = \
 	--with-distro="Buildroot" \
-	--without-ffmpeg \
-	--disable-gomp \
 	--disable-stack-protector
 
 ifeq ($(BR2_PACKAGE_ALSA_LIB_PCM),y)