Remove deprecated ESLint rules after version update.

lib/markdownlint.js

@@ -12,7 +12,7 @@ const helpers = require("../helpers");
 const cache = require("./cache");
 
 // @ts-ignore
-// eslint-disable-next-line camelcase, max-len, no-inline-comments, no-undef
+// eslint-disable-next-line camelcase, no-inline-comments, no-undef
 const dynamicRequire = (typeof __non_webpack_require__ === "undefined") ? require : /* c8 ignore next */ __non_webpack_require__;
 // Capture native require implementation for dynamic loading of modules
 
@@ -604,7 +604,6 @@ function lintContent(
     // eslint-disable-next-line jsdoc/require-jsdoc
     function throwError(property) {
       throw new Error(
-        // eslint-disable-next-line max-len
         `Value of '${property}' passed to onError by '${ruleName}' is incorrect for '${name}'.`);
     }
     // eslint-disable-next-line jsdoc/require-jsdoc

lib/md051.js

@@ -42,7 +42,6 @@ function convertHeadingToHTMLFragment(headingText) {
     inlineText
       .toLowerCase()
       // RegExp source with Ruby's \p{Word} expanded into its General Categories
-      // eslint-disable-next-line max-len
       // https://github.com/gjtorikian/html-pipeline/blob/main/lib/html/pipeline/toc_filter.rb
       // https://ruby-doc.org/core-3.0.2/Regexp.html
       .replace(