delete replaced by schema update

[mikedilger]

At least in my database I have multiple events that are the same replaceable group. For example:
(pubkey: me, kind: 30000, d: "Politics") has at least these 2 events:

2eecac2f153731801fb915239c25119bf1b52e2f5d82535b638f066562105371
c1945d3e21cc2ad0d57ca46ccddf8a1051df97086355b69115f609fc9eefdf3c

I need a schema update to find and fix these. I believe incoming replaceable events will prevent this from recurring.