diff --git a/src/main/resources/io/jenkins/plugins/bootstrap5.jelly b/src/main/resources/io/jenkins/plugins/bootstrap5.jelly
index 2d7110e..ca47405 100644
--- a/src/main/resources/io/jenkins/plugins/bootstrap5.jelly
+++ b/src/main/resources/io/jenkins/plugins/bootstrap5.jelly
@@ -2,19 +2,16 @@
 <!--
 Use it like <st:adjunct includes="io.jenkins.plugins.bootstrap5"/>
 -->
-<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler">
+<j:jelly xmlns:j="jelly:core">
 
   <j:new var="h" className="hudson.Functions" />
   ${h.initPageVariables(context)}
 
-  <st:adjunct includes="io.jenkins.plugins.jquery3"/> <!-- FIXME: no-prototype.js depends on JQuery -->
-
   <link type="text/css" rel="stylesheet" href="${resURL}/plugin/bootstrap5-api/css/bootstrap-custom-build.css"/>
   <link type="text/css" rel="stylesheet" href="${resURL}/plugin/bootstrap5-api/css/jenkins-style.css"/>
 
   <script type="text/javascript" src="${resURL}/plugin/bootstrap5-api/js/popper.min.js"/>
   <script type="text/javascript" src="${resURL}/plugin/bootstrap5-api/js/bootstrap.min.js"/>
-  <script type="text/javascript" src="${resURL}/plugin/bootstrap5-api/js/no-prototype.js"/>
   <script type="text/javascript" src="${resURL}/plugin/bootstrap5-api/js/theme-support.js"/>
 
   <script>
diff --git a/src/main/webapp/js/no-prototype.js b/src/main/webapp/js/no-prototype.js
deleted file mode 100644
index 2bdec26..0000000
--- a/src/main/webapp/js/no-prototype.js
+++ /dev/null
@@ -1,17 +0,0 @@
-/* global Prototype, jQuery3 */
-if (typeof Prototype === 'object' && Prototype.BrowserFeatures.ElementExtensions) {
-    const disablePrototypeJS = function (method, pluginsToDisable) {
-        const handler = function (event) {
-            event.target[method] = undefined;
-            setTimeout(function () {
-                delete event.target[method];
-            }, 0);
-        };
-        pluginsToDisable.each(function (plugin) {
-            jQuery3(window).on(method + '.bs.' + plugin, handler);
-        });
-    };
-    const pluginsToDisable = ['collapse', 'dropdown', 'modal', 'tooltip', 'popover', 'tab'];
-    disablePrototypeJS('show', pluginsToDisable);
-    disablePrototypeJS('hide', pluginsToDisable);
-}