fix: remove import Missing

Author: Sudrut

src/content/docs/cpp/language/functions/variadic_arguments.mdx

@@ -11,7 +11,6 @@ import { DR, DRList } from "@components/defect-report";
 import { Desc, DescList, DocLink } from '@components/index';
 import { autoRev, Revision, RevisionBlock } from "@components/revision";
 import Behavior from "@components/Behavior.astro";
-import Missing from "@components/Missing.astro";
 
 Allows a function to accept any number of extra arguments.