remove 401-ing logo from app.json

Author: kennethreitz

app.json

@@ -1,9 +1,8 @@
 {
   "name": "Python on Heroku example",
   "description": "A barebones Python app, which can easily be deployed to Heroku.",
-  "logo": "https://photos-1.dropbox.com/t/2/AABCmL8w0GvyYBEjfGa49LRXCNIVv7jQ2yg_0J5qnv93HQ/12/1636974/png/32x32/1/1446253200/0/2/heroku-logo-stroke-purple.png/EN6UqwEYpKq3MyAHKAc/j4JHowjJ5xrFapcyO-1V_jJ_lR_4spjZEfBvaPPArTs?size_mode=2&size=1280x960",
   "image": "heroku/python",
   "repository": "https://github.com/heroku/python-getting-started",
   "keywords": ["python", "django" ],
   "addons": [ "heroku-postgresql" ]
-}
+}