removed Sledgehammer's support for the DFG syntax;
this removes 350 buggy lines from Sledgehammer. SPASS 3.5 and above support the TPTP syntax.
# -*- shell-script -*- :mode=shellscript:
#
# Isabelle user settings sample -- for use in ~/.isabelle/etc/settings
ISABELLE_USEDIR_OPTIONS="-i true -d pdf"
ISABELLE_LOGIC=HOL