Simplify get_post() and perflab_sanitize_plugin_slug() by removing unnecessary else blocks

Author: dilipbheda

plugins/optimization-detective/storage/class-od-url-metrics-post-type.php

@@ -108,9 +108,8 @@ public static function get_post( string $slug ): ?WP_Post {
 		$post = current( $post_query->posts );
 		if ( $post instanceof WP_Post ) {
 			return $post;
-		} else {
-			return null;
 		}
+		return null;
 	}
 
 	/**

plugins/performance-lab/includes/admin/load.php

@@ -284,9 +284,8 @@ function perflab_enqueue_features_page_scripts(): void {
 function perflab_sanitize_plugin_slug( $unsanitized_plugin_slug ): ?string {
 	if ( in_array( $unsanitized_plugin_slug, perflab_get_standalone_plugins(), true ) ) {
 		return $unsanitized_plugin_slug;
-	} else {
-		return null;
 	}
+	return null;
 }
 
 /**