Drop slack

config.yml

@@ -61,7 +61,6 @@ params:
   github_org:           "https://github.com/twbs"
   repo:                 "https://github.com/twbs/bootstrap"
   twitter:              "getbootstrap"
-  slack:                "https://bootstrap-slack.herokuapp.com/"
   opencollective:       "https://opencollective.com/bootstrap"
   blog:                 "https://blog.getbootstrap.com/"
   expo:                 "https://expo.getbootstrap.com/"

site/content/docs/4.6/getting-started/best-practices.md

@@ -17,4 +17,3 @@ We've designed and developed Bootstrap to work in a number of environments. Here
 - Working with Sass files
 - Building new CSS components
 - Working with flexbox
-- Ask in [Slack](https://bootstrap-slack.herokuapp.com/)

site/content/docs/4.6/getting-started/introduction.md

@@ -154,7 +154,6 @@ For improved cross-browser rendering, we use [Reboot]({{< docsref "/content/rebo
 Stay up to date on the development of Bootstrap and reach out to the community with these helpful resources.
 
 - Read and subscribe to [The Official Bootstrap Blog]({{< param blog >}}).
-- Join [the official Slack room]({{< param slack >}}).
 - Chat with fellow Bootstrappers in IRC. On the `irc.libera.chat` server, in the `#bootstrap` channel.
 - Implementation help may be found at Stack Overflow (tagged [`bootstrap-4`](https://stackoverflow.com/questions/tagged/bootstrap-4)).
 - Developers should use the keyword `bootstrap` on packages which modify or add to the functionality of Bootstrap when distributing through [npm](https://www.npmjs.com/search?q=keywords:bootstrap) or similar delivery mechanisms for maximum discoverability.

site/layouts/partials/docs-navbar.html

@@ -56,11 +56,6 @@
         {{ partial "icons/twitter.svg" (dict "class" "navbar-nav-svg") }}
       </a>
     </li>
-    <li class="nav-item">
-      <a class="nav-link px-1 mx-1 py-3 my-n2" href="{{ .Site.Params.slack }}" target="_blank" rel="noopener" aria-label="Slack">
-        {{ partial "icons/slack.svg" (dict "class" "navbar-nav-svg") }}
-      </a>
-    </li>
     <li class="nav-item">
       <a class="nav-link px-1 mx-1 py-3 my-n2" href="{{ .Site.Params.opencollective }}/" target="_blank" rel="noopener" aria-label="Open Collective">
         {{ partial "icons/opencollective.svg" (dict "class" "navbar-nav-svg") }}