Remove unused @ts-expect-error directive for BpkLabel import

Since BpkLabel is now migrated to TypeScript, the @ts-expect-error directive is no longer needed in bpk-component-theme-toggle.

Co-authored-by: Faye-Xiao <20058385+Faye-Xiao@users.noreply.github.com>

Author: Copilot

packages/bpk-component-theme-toggle/src/BpkThemeToggle.tsx

@@ -19,7 +19,6 @@
 import type { ChangeEvent } from 'react';
 import { Component } from 'react';
 
-// @ts-expect-error Untyped import. See `decisions/imports-ts-suppressions.md`.
 import BpkLabel from '../../bpk-component-label';
 // @ts-expect-error Untyped import. See `decisions/imports-ts-suppressions.md`.
 import BpkSelect from '../../bpk-component-select';