Don't remove temp directories in CI on Windows

Author: adamziel

components/Blueprints/Tests/Unit/Steps/StepTestCase.php

@@ -86,6 +86,10 @@ public function setUp(): void {
 	 * @after
 	 */
 	public function tearDown(): void {
+		// Don't clean up on Windows – it adds ~20s to each test in GitHub CI!
+		if (PHP_OS_FAMILY === 'Windows') {
+			return;
+		}
 		// Clean up temp directory
 		if ( is_dir( $this->document_root ) ) {
 			$this->removeDirectory( $this->document_root );