Removed tnl-lattice-init and tnl-view

- tnl-lattice-init was intended only for the tnl-lbm project which is
  deprecated (did not lead anywhere)
- tnl-view has become obsolete, since all mesh functions are going to be
  saved directly in the VTK/VTU/VTI format and thus the conversion from
  .tnl files is not necessary

Both tools were moved to the tnl-legacy repository:
https://mmg-gitlab.fjfi.cvut.cz/gitlab/tnl/tnl-legacy