style(db/rooms): refactor admin room pdu validating

src/service/rooms/timeline/mod.rs

@@ -691,14 +691,15 @@ impl Service {
             .expect("#admins:server_name is a valid room alias"),
         )?;
         if admin_room.filter(|v| v == room_id).is_some() {
-            if pdu.event_type() == &RoomEventType::RoomEncryption {
+            match pdu.event_type() {
+                RoomEventType::RoomEncryption => {
                     warn!("Encryption is not allowed in the admins room");
                     return Err(Error::BadRequest(
                         ErrorKind::Forbidden,
                         "Encryption is not allowed in the admins room.",
                     ));
                 }
-            if pdu.event_type() == &RoomEventType::RoomMember {
+                RoomEventType::RoomMember => {
                     #[derive(Deserialize)]
                     struct ExtractMembership {
                         membership: MembershipState,
@@ -733,6 +734,8 @@ impl Service {
                         }
                     }
                 }
+                _ => {}
+            }
         }
 
         // We append to state before appending the pdu, so we don't have a moment in time with the