Don't set task.userAgents (#4)

Author: devn1x

src/main/java/at/bitfire/ical4android/AndroidTask.kt

@@ -143,7 +143,7 @@ abstract class AndroidTask(
         task.sequence = values.getAsInteger(Tasks.SYNC_VERSION)
         task.summary = values.getAsString(Tasks.TITLE)
         task.location = values.getAsString(Tasks.LOCATION)
-        task.userAgents += taskList.provider.name.packageName
+        // task.userAgents += taskList.provider.name.packageName
 
         values.getAsString(Tasks.GEO)?.let { geo ->
             val (lng, lat) = geo.split(',')