Revert "Vault Timeout Policy (#474)" (#479)

This reverts commit bba2812fdd.

electron/src/services/electronPlatformUtils.service.ts

@@ -88,6 +88,10 @@ export class ElectronPlatformUtilsService implements PlatformUtilsService {
         return Promise.resolve(false);
     }
 
+    lockTimeout(): number {
+        return null;
+    }
+
     launchUri(uri: string, options?: any): void {
         shell.openExternal(uri);
     }