Remove duplicate source trees

[roachspray]

In the steps leading to what apps are in the suite now, we did the following process:

• Gather known bugs related to a version(s) or date-time/commit
• If there seems to be more than 1 version that holds the bugs, compile a few likely versions and run the inputs through to determine which of those versions has the most known bugs.
• Use the version with the most known bugs as the starting point.

In my (ridiculous and perhaps unwarranted) haste to push this to GitHub to coincide with the Japan summit, I left duplicate trees here and committed them. Fix this so there is only one.

Realize it may also be worthwhile to document the above known-bugs version vetting.

[roachspray]

Being done on branch build_and_version_cleanup