Revert "add helper method to add ephemeral messages; also switch 'delete mess…"

web/react/stores/socket_store.jsx

@@ -160,15 +160,11 @@ function handleNewPostEvent(msg) {
             AsyncClient.updateLastViewedAt();
         }
     } else if (UserStore.getCurrentId() !== msg.user_id || post.type !== Constants.POST_TYPE_JOIN_LEAVE) {
-        if (msg.props.ephemeral) {
-            AsyncClient.getChannelAndAddUnreadMessages(msg.channel_id, 1);
-        } else {
-            AsyncClient.getChannel(msg.channel_id);
-        }
+        AsyncClient.getChannel(msg.channel_id);
     }
 
     // Send desktop notification
-    if ((UserStore.getCurrentId() !== msg.user_id || post.props.from_webhook === 'true') && !Utils.isSystemMessage(post) && !post.props.disable_notification) {
+    if ((UserStore.getCurrentId() !== msg.user_id || post.props.from_webhook === 'true') && !Utils.isSystemMessage(post)) {
         const msgProps = msg.props;
 
         let mentions = [];