Fix config option label

cps/templates/config_edit.html

@@ -112,7 +112,7 @@
         <label for="config_uploading">{{_('Enable Uploads')}} {{_('(Please ensure that users also have upload permissions)')}}</label>
     </div>
     <div class="form-group">
-      <label for="config_auto_convert_to_format">{{_('Automatically convert ebooks to format (leave blank to disable)')}}</label>
+      <label for="config_auto_convert_to_format">{{_('Automatically convert ebooks to format')}}</label>
       <select name="config_auto_convert_to_format" id="config_auto_convert_to_format" class="form-control">
           <option value="" >Disable</option>
         {% for format in config.config_upload_formats.split(",") %}