Allow multithreaded Boost libraries
Allow multithreaded Boost libraries

Seems we have been using multithreaded libraries from conda-forge for
some time without issue. Whatever issues we may have encountered using
these libraries on Ubuntu in the past, it doesn't seem that we are
encountering them now. Hence we drop this requirement.

jakirkham/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter,DudLab/rank_filter