Address minor static analysis complaints

Author: westonruter

plugins/image-prioritizer/helper.php

@@ -292,8 +292,10 @@ static function ( $host ) {
  *
  * @return WP_REST_Response|WP_HTTP_Response|WP_Error|mixed Result to send to the client.
  * @noinspection PhpDocMissingThrowsInspection
+ * @noinspection PhpDeprecationInspection
  */
 function image_prioritizer_filter_rest_request_before_callbacks( $response, array $handler, WP_REST_Request $request ) {
+	unset( $handler ); // Unused.
 
 	// Check for class existence and use constant or class method calls accordingly.
 	$route_endpoint = class_exists( 'OD_REST_URL_Metrics_Store_Endpoint' )

plugins/optimization-detective/storage/class-od-rest-url-metrics-store-endpoint.php

@@ -322,6 +322,8 @@ public function handle_rest_request( WP_REST_Request $request ) {
 	 * @return mixed Passed through $result if successful, or otherwise a WP_Error.
 	 */
 	public function decompress_rest_request_body( $result, WP_REST_Server $server, WP_REST_Request $request ) {
+		unset( $server ); // Unused.
+
 		if (
 			$request->get_route() === '/' . self::ROUTE_NAMESPACE . self::ROUTE_BASE &&
 			'application/gzip' === $request->get_header( 'Content-Type' ) &&

plugins/optimization-detective/tests/storage/test-class-od-rest-url-metrics-store-endpoint.php

@@ -9,6 +9,9 @@
  * Class Test_OD_REST_URL_Metrics_Store_Endpoint used to test `OD_REST_URL_Metrics_Store_Endpoint` class.
  *
  * @since n.e.x.t
+ *
+ * @noinspection PhpUnhandledExceptionInspection
+ * @noinspection PhpDocMissingThrowsInspection
  */
 class Test_OD_REST_URL_Metrics_Store_Endpoint extends WP_UnitTestCase {
 	use Optimization_Detective_Test_Helpers;
@@ -1065,6 +1068,9 @@ private function create_request( array $params ): WP_REST_Request {
 		$request->set_query_params( wp_array_slice_assoc( $params, array( 'hmac', 'current_etag', 'slug', 'cache_purge_post_id' ) ) );
 		$request->set_header( 'Origin', home_url() );
 		unset( $params['hmac'], $params['slug'], $params['current_etag'], $params['cache_purge_post_id'] );
+		if ( ! function_exists( 'gzencode' ) ) {
+			throw new Exception( 'The gzencode() function is not available.' );
+		}
 		$request->set_body( gzencode( wp_json_encode( $params ) ) );
 		return $request;
 	}