remove some various unused functions and mark some possibly important ones *for now*

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/appservice/mod.rs

@@ -206,6 +206,9 @@ impl Service {
 	}
 
 	/// Checks if a given room id matches any exclusive appservice regex
+	///
+	/// TODO: use this?
+	#[allow(dead_code)]
 	pub(crate) async fn is_exclusive_room_id(&self, room_id: &RoomId) -> bool {
 		self.read()
 			.await