include/rank_filter.hxx: Drop unneeded VIGRA linear algebra library.
include/rank_filter.hxx: Drop unneeded VIGRA linear algebra library.

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