fix(coreos-base/coreos-dev): Drop perf from dev build.

We haven't been using it, the version we have is old, and the build
appears to be a little flaky. Just drop it, can always bump and re-add
later if someone wants it.
Merge pull request #331 from marineam/perf

fix(coreos-base/coreos-dev): Drop perf from dev build.