Remove polaris-cli and polaris-codemods packages (#10101)

Use only the `@shopify/polaris-migrator` package.

This also removes the documentation for the Polaris CLI on the [Tools
page](https://polaris.shopify.com/tools/polaris-cli).

Removing these packages will

* **Improve our CI times** by removing extra packages from our build,
test, and lint workflows
* **Reduce confusion** on where to add new migrations or update previous
migrations
* **Clean up things** such as ESLint configs, changelog entries on
Version Package PRs, and package dep bumps

.changeset/friendly-bananas-crash.md

@@ -0,0 +1,11 @@
+---
+'@shopify/polaris-migrator': minor
+---
+
+Removed the `@shopify/polaris-cli` and `@shopify/polaris-codemods` package in favor of using only the `@shopify/polaris-migrator`.
+
+Removing these packages will provide the following benefits:
+
+- Improve CI time by removing extra packages from our build, test, and lint workflows
+- Reduce confusion on where to add new migrations or update previous migrations
+- Clean up ESLint configs, reduce changelog entries, and remove package dependencies

.eslintrc.js

@@ -98,29 +98,6 @@ module.exports = {
   },
   overrides: [
     ...packages.map((packageDir) => noExtraneousDependenciesConfig(packageDir)),
-    {
-      files: ['polaris-cli/src/**/*.{ts,tsx}'],
-      rules: {
-        'import/no-default-export': 'off',
-      },
-    },
-    {
-      files: ['polaris-codemods/src/**/*.{ts,tsx}'],
-      rules: {
-        'import/no-default-export': 'off',
-        // Issue with inconsistent import order between node 14 and 16.
-        // This could be removed after dropping node 14 support.
-        'import/order': 'off',
-      },
-    },
-    {
-      files: ['polaris-codemods/src/**/tests/*.{ts,tsx}'],
-      rules: {
-        'import/no-extraneous-dependencies': 'off',
-        '@shopify/jsx-no-hardcoded-content': 'off',
-        '@typescript-eslint/ban-ts-comment': 'off',
-      },
-    },
     {
       files: ['polaris-migrator/src/**/*.{ts,tsx}'],
       rules: {

package.json

@@ -7,8 +7,6 @@
   },
   "workspaces": {
     "packages": [
-      "polaris-cli",
-      "polaris-codemods",
       "polaris-tokens",
       "polaris-for-vscode",
       "polaris-icons",