Remove [conn] from log

Summary: Not really a connectivity related log, so removed [conn] from it.

Reviewed By: passy

Differential Revision: D48266546

fbshipit-source-id: e384301d6301940366b594b4bc612349cc2264ce

desktop/flipper-frontend-core/src/AbstractClient.tsx

@@ -134,7 +134,7 @@ export default abstract class AbstractClient extends EventEmitter {
         'Fetch plugin timeout. Unresponsive client?',
       );
     } catch (e) {
-      console.warn('[conn] Fetch plugin error', e);
+      console.warn('Failed to fetch plugin', e);
     }
     this.plugins = new Set(response?.plugins ?? []);
     console.info('AbstractClient.loadPlugins', this.query, [...this.plugins]);