refactor: remove scroll sensitivity functionality and clean up related code (#477)

- Removed scroll sensitivity state and associated functions from jsonrpc.go and WebRTCVideo component.
- Cleaned up device settings store by eliminating unused scroll sensitivity logic.
- Updated mouse settings route to reflect the removal of scroll sensitivity feature.
- Simplified mouse wheel event handling in WebRTCVideo component.

ui/src/routes/devices.$id.tsx

@@ -18,11 +18,9 @@ import useWebSocket from "react-use-websocket";
 
 import { cx } from "@/cva.config";
 import {
-  DeviceSettingsState,
   HidState,
   NetworkState,
   UpdateState,
-  useDeviceSettingsStore,
   useDeviceStore,
   useHidStore,
   useMountMediaStore,
@@ -714,21 +712,6 @@ export default function KvmIdRoute() {
     });
   }, [appVersion, send, setAppVersion, setSystemVersion]);
 
-  const setScrollSensitivity = useDeviceSettingsStore(
-    state => state.setScrollSensitivity,
-  );
-
-  // Initialize device settings
-  useEffect(
-    function initializeDeviceSettings() {
-      send("getScrollSensitivity", {}, resp => {
-        if ("error" in resp) return;
-        setScrollSensitivity(resp.result as DeviceSettingsState["scrollSensitivity"]);
-      });
-    },
-    [send, setScrollSensitivity],
-  );
-
   const ConnectionStatusElement = useMemo(() => {
     const hasConnectionFailed =
       connectionFailed || ["failed", "closed"].includes(peerConnectionState || "");