Update MD039/no-space-in-links to remove outdated validLink helper an…

…d simplify slightly.

lib/md039.mjs

@@ -1,7 +1,7 @@
 // @ts-check
 
 import { addErrorContext } from "../helpers/helpers.cjs";
-import { getReferenceLinkImageData, filterByTypesCached } from "./cache.mjs";
+import { filterByTypesCached } from "./cache.mjs";
 
 /**
  * Adds an error for a label space issue.
@@ -35,41 +35,22 @@ function addLabelSpaceError(onError, label, labelText, isStart) {
   );
 }
 
-/**
- * Determines if a link is a valid link (and not a fake shortcut link due to parser tricks).
- *
- * @param {import("markdownlint").MicromarkToken} label Label token.
- * @param {import("markdownlint").MicromarkToken} labelText LabelText token.
- * @param {Map<string, any>} definitions Map of link definitions.
- * @returns {boolean} True iff the link is valid.
- */
-function validLink(label, labelText, definitions) {
-  return (label.parent?.children.length !== 1) || definitions.has(labelText.text.trim());
-}
-
 /** @type {import("markdownlint").Rule} */
 export default {
   "names": [ "MD039", "no-space-in-links" ],
   "description": "Spaces inside link text",
   "tags": [ "whitespace", "links" ],
   "parser": "micromark",
   "function": function MD039(params, onError) {
-    const { definitions } = getReferenceLinkImageData();
     const labels = filterByTypesCached([ "label" ])
       .filter((label) => label.parent?.type === "link");
     for (const label of labels) {
       const labelTexts = label.children.filter((child) => child.type === "labelText");
       for (const labelText of labelTexts) {
-        if (
-          (labelText.text.trimStart().length !== labelText.text.length) &&
-          validLink(label, labelText, definitions)
-        ) {
+        if (labelText.text.trimStart().length !== labelText.text.length) {
           addLabelSpaceError(onError, label, labelText, true);
         }
-        if (
-          (labelText.text.trimEnd().length !== labelText.text.length) &&
-          validLink(label, labelText, definitions)
-        ) {
+        if (labelText.text.trimEnd().length !== labelText.text.length) {
           addLabelSpaceError(onError, label, labelText, false);
         }
       }