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>

package.json

@@ -92,7 +92,6 @@
     "@vitest/eslint-plugin": "1.6.20",
     "eslint": "10.6.0",
     "eslint-import-resolver-typescript": "4.4.5",
-    "eslint-plugin-array-func": "5.1.1",
     "eslint-plugin-import-x": "4.17.1",
     "eslint-plugin-playwright": "2.10.4",
     "eslint-plugin-regexp": "3.1.1",