Remove ln "-T" option from cavaskit demo

-T isn't supported on mac.

Change-Id: Ic25dd48de1cfddcccb4d4b09f12585d889e5184d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/277779
Reviewed-by: Kevin Lubick <kjlubick@google.com>

modules/canvaskit/Makefile

@@ -56,7 +56,7 @@ npm:
 local-example:
 	rm -rf node_modules/canvaskit
 	mkdir -p node_modules
-	ln -s -T ../canvaskit node_modules/canvaskit
+	ln -s ../canvaskit node_modules/canvaskit
 	echo "Go check out http://localhost:8000/canvaskit/example.html"
 	python serve.py