chore: remove eslint-plugin-array-func (#38294)

The rules from `eslint-plugin-array-func` are redundant with
`eslint-plugin-unicorn`:

- `from-map` → `unicorn/prefer-array-from-map`
- `no-unnecessary-this-arg` → `unicorn/no-array-method-this-argument`
- `prefer-flat` / `prefer-flat-map` → `unicorn/prefer-array-flat` /
`unicorn/prefer-array-flat-map` (already disabled here)

The two remaining rules (`avoid-reverse`, `prefer-array-from`) are niche
and not worth carrying an extra dependency for.

Co-authored-by: bircni <bircni@icloud.com>

types.d.ts

@@ -1,9 +1,3 @@
-declare module 'eslint-plugin-array-func' {
-  import type {Eslint} from 'eslint';
-  const plugin: Eslint.Plugin;
-  export = plugin;
-}
-
 declare module '*.svg' {
   const value: string;
   export default value;