Revert "Dump BB, beta and test projects."

This reverts commit db2b263b668456b2e5ca05fccf677499b30cedfd.
Revert "Use latest build tools version."

This reverts commit 91090286c7b4a8f6ba0bc69473ed125e4de81247.
Revert "Build X module by default."

This reverts commit d8b8e5cfd8a8a2fb939eb9a35f572792c05bfb68.