Remove deprecated portal implementation

packages/builder/src/components/common/Modal/portal.js

@@ -1,14 +0,0 @@
-export function portal(node, targetNodeOrSelector) {
-  const targetNode =
-    typeof targetNodeOrSelector == "string"
-      ? document.querySelector(targetNodeOrSelector)
-      : targetNodeOrSelector
-  const portalChildren = [...node.children]
-  targetNode.append(...portalChildren)
-
-  return {
-    destroy() {
-      for (const portalChild of portalChildren) portalChild.remove()
-    },
-  }
-}