Remove MMD config.

[cpu]

Note to reviewers: This builds on #88 - please review/merge that first. b35b2ee onward is the new content in this branch.

Resolves https://github.com/letsencrypt/ct-woodpecker/issues/89

[coveralls]

Pull Request Test Coverage Report for Build 676

• 11 of 11 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.3%) to 67.907%

---

Totals
Change from base Build 674:	-0.3%
Covered Lines:	821
Relevant Lines:	1209

---

💛 - Coveralls

[cpu]

LGTM, but I think this branch needs master merged into it.

:ballot_box_with_check: 643f317