Remove unneeded `ts-expect-error

Author: wooorm

lib/index.js

@@ -1,6 +1,4 @@
 /**
- * @typedef {import('estree-jsx').Program} Program
- *
  * @typedef {import('mdast-util-from-markdown').CompileContext} CompileContext
  * @typedef {import('mdast-util-from-markdown').Extension} FromMarkdownExtension
  * @typedef {import('mdast-util-from-markdown').Handle} FromMarkdownHandle
@@ -73,8 +71,6 @@ function enterMdxTextExpression(token) {
  */
 function exitMdxExpression(token) {
   const value = this.resume()
-  /** @type {Program | undefined} */
-  // @ts-expect-error: estree.
   const estree = token.estree
   const node = /** @type {MdxFlowExpression | MdxTextExpression} */ (
     this.exit(token)