Revert "Logo uploader"

Reverts dimagi/commcare-hq#5116
Create a new project - click on the "Applications" tab.  It'll 500.  Looks like it was introduced by this PR, reverting 'till it's resolved
https://staging.commcarehq.org/a/treshgfhghllhv/apps/
@nickpell 
E501 line too long (196 > 115 characters)