fix path in tests

Author: mdebbar

lib/web_ui/dev/steps/compile_tests_step.dart

@@ -172,7 +172,6 @@ Future<void> copySkwasm() async {
 
 final io.Directory _localCanvasKitDir = io.Directory(pathlib.join(
   environment.wasmReleaseOutDir.path,
-  'flutter_web_sdk',
   'canvaskit',
 ));
 final io.File _localCanvasKitWasm = io.File(pathlib.join(