Remove unused generic class leftover

Author: iMattPro

styles/prosilver/template/event/ucp_notifications_content_before.html

@@ -12,7 +12,7 @@
 				<dl>
 					<dt><label for="toggle_popup_prompt">{{ lang('NOTIFY_WEBPUSH_POPUP_DISABLE') ~ lang('COLON') }}</label><br><span>{{ lang('NOTIFY_WEBPUSH_POPUP_DISABLE_EXPLAIN') }}</span></dt>
 					<dd>
-						<button id="toggle_popup_prompt" type="button" name="toggle_popup_prompt" class="wpn-toggle-button" aria-label="{{ lang('NOTIFY_WEBPUSH_POPUP_DISABLE') }}">
+						<button id="toggle_popup_prompt" type="button" name="toggle_popup_prompt" aria-label="{{ lang('NOTIFY_WEBPUSH_POPUP_DISABLE') }}">
 							<i class="icon icon-lg fa-fw fa-toggle-{% if S_WEBPUSH_POPUP_DISABLED %}on{% else %}off{% endif %}" aria-hidden="true"></i>
 						</button>
 					</dd>