fix

components/notification/PurePanel.tsx

@@ -21,6 +21,9 @@ export const TypeIcon = {
 };
 
 export function getCloseIcon(prefixCls: string, closeIcon?: React.ReactNode): React.ReactNode {
+  if (closeIcon === null || closeIcon === false) {
+    return null;
+  }
   return (
     closeIcon || (
       <span className={`${prefixCls}-close-x`}>