CMakeLists.txt appears to have far too many dependencies

[barcharcraz]

It seems like the CMakeLists.txt that was added a week ago lists a bunch of dependencies that boost test doesn't actually depend on, except for it's own tests/examples. MPL seems to be one example but there may be others.

[pdimov]

https://pdimov.github.io/boostdep-report/develop/test.html#mpl