package/lv2: drop optional dependency on libgtk2

As we're about to remove libgtk2, let's drop the optional dependency
of lv2 on libgtk2.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>

package/lv2/lv2.mk

@@ -24,10 +24,6 @@ ifeq ($(BR2_PACKAGE_LIBSNDFILE),y)
 LV2_DEPENDENCIES += libsndfile
 endif
 
-ifeq ($(BR2_PACKAGE_LIBGTK2),y)
-LV2_DEPENDENCIES += libgtk2
-endif
-
 ifeq ($(BR2_STATIC_LIBS),y)
 LV2_CONF_OPTS += -Dplugins=disabled
 endif