lint: fix most eslint/no-empty-function violations (#6457)

* lint: fix most eslint/no-empty-function violations

* Remove unnecessary closing brace in .oxlintrc.json

packages/desktop-electron/preload.ts

@@ -75,7 +75,10 @@ contextBridge.exposeInMainWorld('Actual', {
 
   // No auto-updates in the desktop app
   isUpdateReadyForDownload: () => false,
-  waitForUpdateReadyForDownload: () => new Promise<void>(() => {}),
+  waitForUpdateReadyForDownload: () =>
+    new Promise<void>(() => {
+      // This is used in browser environment; do nothing in electron
+    }),
 
   getServerSocket: async () => {
     return null;