fix(sync): Stop waking sync loops when removing to-device events

changelog.d/2006.bugfix

@@ -0,0 +1 @@
+Fixed high CPU usage when multiple clients from the same account were connected at once. Each sync woke the account's other sync loops, causing them to wake each other in a loop.

src/service/users/device.rs

@@ -253,8 +253,6 @@ impl super::Service {
 				self.db.todeviceid_events.del(key);
 			})
 			.await;
-
-		self.services.sync.wake(user_id).await;
 	}
 
 	/// Updates device metadata and increments the device list version.