Demote active iOS device error

Summary: The error is non-fatal as it's already handled and it's not actionable by the Flipper team.

Reviewed By: lawrencelomax

Differential Revision: D44054514

fbshipit-source-id: c54c7e935374a1c97e54a5da4daaa3f26b236023

desktop/flipper-server-core/src/devices/ios/IOSBridge.tsx

@@ -144,7 +144,7 @@ export class IDBBridge implements IOSBridge {
     return iosUtil
       .targets(this.idbPath, this.enablePhysicalDevices)
       .catch((e) => {
-        console.error('Failed to get active iOS devices:', e.message);
+        console.warn('Failed to get active iOS devices:', e.message);
         return [];
       });
   }