remove svg renderer package which doesnt exist yet

package.json

@@ -86,7 +86,6 @@
     "scratch-blocks": "latest",
     "scratch-render": "latest",
     "scratch-storage": "^0.2.0",
-    "scratch-svg-renderer": "latest",
     "scratch-vm": "latest",
     "selenium-webdriver": "3.5.0",
     "startaudiocontext": "1.2.1",