Revert "feat: WordPress 6.7 compatibility change"

This reverts commit fa051ae0.

This commit was wrong, as translation files may be registered at
`plugins_loaded`, it's the i18n functions (e.g. `__`) that should be
deferred after `init` hook.

src/Extension/CommonBinding/I18n.php

@@ -14,7 +14,11 @@ class I18n implements Hookable {
 	}
 
 	public function hooks(): void {
-		add_action( 'init', $this );
+		if ( did_action( 'plugins_loaded' ) ) {
+			$this->__invoke();
+		} else {
+			add_action( 'plugins_loaded', $this );
+		}
 	}
 
 	public function __invoke(): void {