refactor(resource): drop aksrt_resource CPT residue, post+meta only

inc/classes/widgets/class-aksrt-home-widgets.php

@@ -29,13 +29,7 @@ if (!function_exists('aksrt_home_widget_post_types')) {
 	 * @return array<int, string>
 	 */
 	function aksrt_home_widget_post_types(): array {
-		$post_types = ['post'];
-
-		if (function_exists('aksrt_resource_post_types')) {
-			$post_types = array_unique(array_merge($post_types, aksrt_resource_post_types()));
-		}
-
-		return array_values(array_filter(array_map('sanitize_key', $post_types)));
+		return ['post'];
 	}
 }