Remove unused string

Author: timhunt

lang/en/tiny_embedquestion.php

@@ -23,6 +23,5 @@
  */
 
 $string['embedqcode'] = 'Embed question code';
-$string['loading'] = 'Loading...';
 $string['pluginname'] = 'Embedded question';
 $string['privacy:metadata'] = 'The Tiny Embed question plugin does not store any personal data.';