Remove obsolete code in glidein_startup

[mmascher]

There have been a couple of issues related to environment setup:

https://ggus.eu/index.php?mode=ticket_info&ticket_id=161645#update#5
https://ggus.eu/index.php?mode=ticket_info&ticket_id=161024

I believe this code (which si 15 years old) is not needed anymore in the container world we live in:

glideinwms/creation/web_base/glidein_startup.sh

Lines 982 to 1027 in daffc05

	########################################
	# Setup OSG and/or Globus
	if [ -r "${OSG_GRID}/setup.sh" ]; then
	. "${OSG_GRID}/setup.sh"
	else
	if [ -r "${GLITE_LOCAL_CUSTOMIZATION_DIR}/cp_1.sh" ]; then
	. "${GLITE_LOCAL_CUSTOMIZATION_DIR}/cp_1.sh"
	fi
	fi
	if [ -z "${GLOBUS_PATH}" ]; then
	if [ -z "${GLOBUS_LOCATION}" ]; then
	# if GLOBUS_LOCATION not defined, try to guess it
	if [ -r "/opt/globus/etc/globus-user-env.sh" ]; then
	GLOBUS_LOCATION=/opt/globus
	elif [ -r "/osgroot/osgcore/globus/etc/globus-user-env.sh" ]; then
	GLOBUS_LOCATION=/osgroot/osgcore/globus
	else
	warn "GLOBUS_LOCATION not defined and could not guess it."
	warn "Looked in:"
	warn ' /opt/globus/etc/globus-user-env.sh'
	warn ' /osgroot/osgcore/globus/etc/globus-user-env.sh'
	warn 'Continuing like nothing happened'
	fi
	fi
	if [ -r "${GLOBUS_LOCATION}/etc/globus-user-env.sh" ]; then
	. "${GLOBUS_LOCATION}/etc/globus-user-env.sh"
	else
	warn "GLOBUS_PATH not defined and ${GLOBUS_LOCATION}/etc/globus-user-env.sh does not exist."
	warn 'Continuing like nothing happened'
	fi
	fi
	set_proxy_fullpath() {
	# Set the X509_USER_PROXY path to full path to the file
	if fullpath="$(readlink -f "${X509_USER_PROXY}")"; then
	echo "Setting X509_USER_PROXY ${X509_USER_PROXY} to canonical path ${fullpath}" 1>&2
	export X509_USER_PROXY="${fullpath}"
	else
	echo "Unable to get canonical path for X509_USER_PROXY, using ${X509_USER_PROXY}" 1>&2
	fi
	}
	[ -n "${X509_USER_PROXY}" ] && set_proxy_fullpath

Should we remove it? Is there anything that is set up there that the pilot needs? The user job should find everything they need in the container.

[mmascher]

Here is another issue caused by this code: https://ggus.eu/?mode=ticket_info&ticket_id=164040