external_api: don't use the Jitsi Meet logger

This is for other applications to use, and it's currently only used for logging
1 line, so use console.error.

modules/API/external/external_api.js

     setVideoInputDevice
 } from './functions';
 
-const logger = require('jitsi-meet-logger').getLogger(__filename);
-
 const ALWAYS_ON_TOP_FILENAMES = [
     'css/all.css', 'libs/alwaysontop.min.js'
 ];
      */
     executeCommand(name, ...args) {
         if (!(name in commands)) {
-            logger.error('Not supported command name.');
+            console.error('Not supported command name.');
 
             return;
         }