Revert "chore: (eslint) restrict imports of @material-ui Link"

This reverts commit 7539b36748.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/great-colts-invite.md

@@ -1,16 +0,0 @@
----
-'@backstage/cli': minor
----
-
-Added a new ESLint rule that restricts imports of Link from @material-ui
-
-The rule can be can be overridden in the following way:
-
-```diff
-module.exports = require('@backstage/cli/config/eslint-factory')(__dirname, {
-+  restrictedImports: [
-+    { name: '@material-ui/core', importNames: [] },
-+    { name: '@material-ui/core/Link', importNames: [] },
-+  ],
-});
-```

packages/cli/config/eslint-factory.js

@@ -239,17 +239,6 @@ function createConfigForRole(dir, role, extraConfig = {}) {
             name: '@material-ui/icons/', // because this is possible too ._.
             message: "Please import '@material-ui/icons/<Icon>' instead.",
           },
-          {
-            name: '@material-ui/core',
-            importNames: ['Link'],
-            message:
-              'Prefer using `Link` from `@backstage/core-components` rather than material-UI',
-          },
-          {
-            name: '@material-ui/core/Link',
-            message:
-              'Prefer using `Link` from `@backstage/core-components` rather than material-UI',
-          },
           ...require('module').builtinModules,
           ...(extraConfig.restrictedImports ?? []),
         ],