[bfss, migration] fix storage migration (closes #2189206) The storage migration intend to clean the attributes cache but in practice it was trying to discard attribut edition. As no attribut were edited this lead to a crash.

#! /bin/sh -e
#

if [ "$1" = remove -o "$1" = upgrade ]; then
  if which install-docs >/dev/null 2>&1; then
    install-docs -r cubicweb-doc
  fi
fi

#DEBHELPER#

exit 0