package/spice: drop duplicated opus handling

opus dependency is handled twice since commit
f33f7a4f6407f624edb4b4ffe54cb09e029a49b2

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 929c977afb212eebdee07ae1333b3aaf0f660021)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/spice/spice.mk

@@ -45,11 +45,6 @@ else
 SPICE_CONF_OPTS += --disable-opus
 endif
 
-# no enable/disable, detected using pkg-config
-ifeq ($(BR2_PACKAGE_OPUS),y)
-SPICE_DEPENDENCIES += opus
-endif
-
 # We need to tweak spice.pc because it /forgets/ (for static linking) that
 # it should link against libz and libjpeg. libz is pkg-config-aware, while
 # libjpeg isn't, hence the two-line tweak