obs-transitions: Disable separate track matte file for now

Because it's not currently possible to guarantee synchronization between
two separate media files (yet), disable separated track matte media
files for now. It'll just result in support requests that can't be
solved.

plugins/obs-transitions/transition-stinger.c

@@ -648,9 +648,14 @@ static obs_properties_t *stinger_properties(void *data)
 		obs_property_list_add_int(
 			p, obs_module_text("TrackMatteLayoutVertical"),
 			MATTE_LAYOUT_VERTICAL);
+
+		/* TODO: Requires way to synchronize or combine two media files
+		 * together */
+#if 0
 		obs_property_list_add_int(
 			p, obs_module_text("TrackMatteLayoutSeparateFile"),
 			MATTE_LAYOUT_SEPARATE_FILE);
+#endif
 
 		obs_property_set_modified_callback(p,
 						   track_matte_layout_modified);