Remove duplicate 2018-07-05 event
Remove duplicate 2018-07-05 event

Looks like git wasn't perfectly clever when it resolved some changes
between commits, ended up with 2 cards for the 2018-07-05 event.

Removing the old one.

dcos/dcos-website,dcos/dcos-website,dcos/dcos-website,dcos/dcos-website