package/weston: Remove redundant dependency

It's already there, unconditionally, in the list of main dependencies.

Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/weston/weston.mk

@@ -86,7 +86,6 @@ ifeq ($(BR2_PACKAGE_WESTON_DRM),y)
 WESTON_CONF_OPTS += \
 	--enable-drm-compositor \
 	WESTON_NATIVE_BACKEND=drm-backend.so
-WESTON_DEPENDENCIES += libdrm
 else
 WESTON_CONF_OPTS += --disable-drm-compositor
 endif