Removed functionality
^^^^^^^^^^^^^^^^^^^^^

.. Note to developers!
   Please use """"""" to underline the individual entries for fixed issues in the subfolders,
   otherwise the formatting on the webpage is messed up.
   Also, please use the syntax :issue:`number` to reference issues on GitLab, without the
   a space between the colon and number!

Removed GMX_SCSIGMA_MIN environment variable
""""""""""""""""""""""""""""""""""""""""""""

This was used to reproduce free-energy soft-core behavior of |Gromacs| versions before 4.5.
