remove deprecated file (#18794)

`getComponents` file is no longer imported anywhere

apps/docs/lib/mdx/getComponents.tsx

@@ -1,39 +0,0 @@
-import Image from 'next/legacy/image'
-import LinkCard from '~/components/LinkCard'
-import LinkCardsWrapper from '~/components/LinkCardsWrapper'
-
-const ignoreClass = 'ignore-on-export'
-
-function getComponents(type: any) {
-  const components = {
-    LinkCardsWrapper: (props: any) => <LinkCardsWrapper {...props} />,
-    LinkCard: (props: any) => <LinkCard {...props} />,
-    img: (props: any) => {
-      if (props.className !== ignoreClass) {
-        return (
-          <div
-            className={[
-              'next-image--dynamic-fill',
-              type === 'blog' && 'to-border-overlay from-border rounded-lg border bg-gradient-to-r',
-            ].join(' ')}
-          >
-            <Image
-              {...props}
-              className={['next-image--dynamic-fill', type === 'blog' && 'rounded-md border'].join(
-                ' '
-              )}
-              layout="fill"
-              alt=""
-            />
-          </div>
-        )
-      }
-      // eslint-disable-next-line @next/next/no-img-element, jsx-a11y/alt-text
-      return <img {...props} />
-    },
-  }
-
-  return components
-}
-
-export default getComponents