FIX: removes discourse-teams-sidebar support (#22465)

This plugin is now archived we don't need to carry this code anymore.

plugins/chat/assets/javascripts/discourse/components/sidebar-channels.hbs

@@ -1,3 +0,0 @@
-{{#if this.isDisplayed}}
-  <ChannelsList @toggleSection={{this.toggleSection}} @inSidebar={{true}} />
-{{/if}}

plugins/chat/assets/javascripts/discourse/components/sidebar-channels.js

@@ -1,16 +0,0 @@
-import Component from "@ember/component";
-import { computed } from "@ember/object";
-import { inject as service } from "@ember/service";
-
-export default class SidebarChannels extends Component {
-  @service chat;
-  @service router;
-
-  tagName = "";
-  toggleSection = null;
-
-  @computed("chat.userCanChat")
-  get isDisplayed() {
-    return this.chat.userCanChat;
-  }
-}

plugins/chat/assets/javascripts/discourse/connectors/sidebar-bottom/sidebar-connector.hbs

@@ -1 +0,0 @@
-<SidebarChannels @toggleSection={{this.toggleSection}} />