resolve and add even more pedantic clippy lints

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

src/database/key_value/pusher.rs

@@ -20,7 +20,7 @@ impl service::pusher::Data for KeyValueDatabase {
 				let mut key = sender.as_bytes().to_vec();
 				key.push(0xFF);
 				key.extend_from_slice(ids.pushkey.as_bytes());
-				self.senderkey_pusher.remove(&key).map(|_| ()).map_err(Into::into)
+				self.senderkey_pusher.remove(&key).map_err(Into::into)
 			},
 		}
 	}