Open file templates/TPL_NAME/submit.tpl (TPL_NAME - template name, in your case MetallicGlare) find line
Code:
$Editor->ToolbarSet = 'Users';
and replace with next one
Code:
$Editor->ToolbarSet = 'Basic';
Furthermore, you can configure buttons in the file res/js/fckeditor/fckconfig.js, lines #98-122