Remove dumps with contact info from GitHub

So, a funny thing happened. I got a call from a number I didn't recognize, and I googled the number. Along with the normal "we're going to create a link with every 10-digit number and ask you to pay $10 a month to see who owns it" results, this repo came up!

That means two things:

1. I was confident I knew who was calling me.
1. Wait a minute, everyone's contact info (and sigs!) are in plaintext in GitHub. This might not be expected/appreciated.

Feel free to ignore, but thought I'd propose removing the sqldumps. They appear not to be referenced anywhere else in the code, so this should be fairly atomic.