Revert "added Bootstrap to editor (#7534)"

This reverts commit 8a886f5.

app/views/editor/rich.html.erb

@@ -1,9 +1,7 @@
 <link href="/lib/woofmark/dist/woofmark.min.css" rel="stylesheet">
 <link href="/lib/bootstrap-tokenfield/dist/css/tokenfield-typeahead.min.css" rel="stylesheet">
 <link href="/lib/bootstrap-tokenfield/dist/css/bootstrap-tokenfield.min.css" rel="stylesheet">
-<link href="/lib/publiclab-editor/node_modules/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet"/>
-<link href="/lib/publiclab-editor/node_modules/bootstrap/less/type.less">
-<script src="/lib/bootstrap-tokenfield/dist/bootstrap-tokenfield.js"></script>
+
 <!-- required for MapModule -->
 <link href="/lib/leaflet/dist/leaflet.css" rel="stylesheet">
 <script src="/lib/leaflet/dist/leaflet.js"></script>
@@ -125,7 +123,7 @@
       </div>
 
       <div class="ple-module-content col-lg-9">
-        <button id="location_button" class="btn btn-lg">
+        <button id="location_button" class="btn btn-lg btn-outline-secondary">
           <i class="fa fa-map-marker" aria-hidden="true"></i>
           Add a location
         </button>
@@ -294,7 +292,7 @@
       -->
     </div>
 
-    <button class="btn btn-lg btn-more">...</button>
+    <button class="btn btn-lg btn-outline-secondary btn-more">...</button>
 
     <span> &nbsp; By publishing, you agree to <a href="https://publiclab.org/licenses">open source your work</a><span class="d-none d-md-inline"> so that others may use it.</span></span>
     <button class="ple-publish btn btn-lg btn-primary float-right disabled"><% if controller.action_name == "edit" && @node.status == 3 %>Save<% else %>Publish<% end %></button>