Remove the now unneeded polyfills.

js/src/dom/polyfill.js

@@ -1,65 +0,0 @@
-/**
- * --------------------------------------------------------------------------
- * Bootstrap (v5.0.0-alpha2): dom/polyfill.js
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
- * --------------------------------------------------------------------------
- */
-
-import { getUID } from '../util/index'
-
-let find = Element.prototype.querySelectorAll
-let findOne = Element.prototype.querySelector
-
-const scopeSelectorRegex = /:scope\b/
-const supportsScopeQuery = (() => {
-  const element = document.createElement('div')
-
-  try {
-    element.querySelectorAll(':scope *')
-  } catch (_) {
-    return false
-  }
-
-  return true
-})()
-
-if (!supportsScopeQuery) {
-  find = function (selector) {
-    if (!scopeSelectorRegex.test(selector)) {
-      return this.querySelectorAll(selector)
-    }
-
-    const hasId = Boolean(this.id)
-
-    if (!hasId) {
-      this.id = getUID('scope')
-    }
-
-    let nodeList = null
-    try {
-      selector = selector.replace(scopeSelectorRegex, `#${this.id}`)
-      nodeList = this.querySelectorAll(selector)
-    } finally {
-      if (!hasId) {
-        this.removeAttribute('id')
-      }
-    }
-
-    return nodeList
-  }
-
-  findOne = function (selector) {
-    if (!scopeSelectorRegex.test(selector)) {
-      return this.querySelector(selector)
-    }
-
-    const matches = find.call(this, selector)
-
-    return matches[0] ? matches[0] : null
-  }
-}
-
-export {
-  find,
-  findOne
-}

js/src/dom/selector-engine.js

@@ -5,8 +5,6 @@
  * --------------------------------------------------------------------------
  */
 
-import { find as findFn, findOne } from './polyfill'
-
 /**
  * ------------------------------------------------------------------------
  * Constants
@@ -21,11 +19,11 @@ const SelectorEngine = {
   },
 
   find(selector, element = document.documentElement) {
-    return [].concat(...findFn.call(element, selector))
+    return [].concat(...Element.prototype.querySelectorAll.call(element, selector))
   },
 
   findOne(selector, element = document.documentElement) {
-    return findOne.call(element, selector)
+    return Element.prototype.querySelector.call(element, selector)
   },
 
   children(element, selector) {