Remove MS08-067 Exploiter

[ilija-lazoroski]

What does this PR do?

Fixes #1677 .

Add any further explanations here.

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• If applicable, add screenshots or log transcripts of the feature working

Explain Changes

Are the commit messages enough? If not, elaborate.

[shreyamalviya]

Missed a reference to Conficker in the repo's main README.md. Otherwise, LGTM.