What system files use /etc/environment?

Looking for environment

vagrant@ubuntu-bionic:~$ sudo grep -lR "/etc/environment" /etc/*
/etc/init.d/cron
/etc/init.d/lxd
/etc/pam.d/cron
/etc/pam.d/login
/etc/pam.d/su
/etc/pam.d/sshd
/etc/rc0.d/K01lxd
/etc/rc1.d/K01lxd
/etc/rc2.d/S01lxd
/etc/rc2.d/S01cron
/etc/rc3.d/S01lxd
/etc/rc3.d/S01cron
/etc/rc4.d/S01lxd
/etc/rc4.d/S01cron
/etc/rc5.d/S01lxd
/etc/rc5.d/S01cron
/etc/rc6.d/K01lxd
/etc/systemd/system/multi-user.target.wants/snapd.service
vagrant@ubuntu-bionic:~$ sudo grep -R "/etc/environment" /etc/*
/etc/init.d/cron:# We read /etc/environment, but warn about locale information in
/etc/init.d/cron:    for ENV_FILE in /etc/environment /etc/default/locale; do
/etc/init.d/cron:             if [ -n "$value" ] && [ "$ENV_FILE" = /etc/environment ]; then
/etc/init.d/cron:                 log_warning_msg "/etc/environment has been deprecated for locale information; use /etc/default/locale for $var=$value instead"
/etc/init.d/lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/pam.d/cron:# Read environment variables from pam_env's default files, /etc/environment
/etc/pam.d/login:# parsing /etc/environment needs "readenv=1"
/etc/pam.d/login:# reading this file *in addition to /etc/environment* does not hurt
/etc/pam.d/su:# parsing /etc/environment needs "readenv=1"
/etc/pam.d/su:# reading this file *in addition to /etc/environment* does not hurt
/etc/pam.d/sshd:# Read environment variables from /etc/environment and
/etc/rc0.d/K01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc1.d/K01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc2.d/S01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc2.d/S01cron:# We read /etc/environment, but warn about locale information in
/etc/rc2.d/S01cron:    for ENV_FILE in /etc/environment /etc/default/locale; do
/etc/rc2.d/S01cron:             if [ -n "$value" ] && [ "$ENV_FILE" = /etc/environment ]; then
/etc/rc2.d/S01cron:                 log_warning_msg "/etc/environment has been deprecated for locale information; use /etc/default/locale for $var=$value instead"
/etc/rc3.d/S01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc3.d/S01cron:# We read /etc/environment, but warn about locale information in
/etc/rc3.d/S01cron:    for ENV_FILE in /etc/environment /etc/default/locale; do
/etc/rc3.d/S01cron:             if [ -n "$value" ] && [ "$ENV_FILE" = /etc/environment ]; then
/etc/rc3.d/S01cron:                 log_warning_msg "/etc/environment has been deprecated for locale information; use /etc/default/locale for $var=$value instead"
/etc/rc4.d/S01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc4.d/S01cron:# We read /etc/environment, but warn about locale information in
/etc/rc4.d/S01cron:    for ENV_FILE in /etc/environment /etc/default/locale; do
/etc/rc4.d/S01cron:             if [ -n "$value" ] && [ "$ENV_FILE" = /etc/environment ]; then
/etc/rc4.d/S01cron:                 log_warning_msg "/etc/environment has been deprecated for locale information; use /etc/default/locale for $var=$value instead"
/etc/rc5.d/S01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/rc5.d/S01cron:# We read /etc/environment, but warn about locale information in
/etc/rc5.d/S01cron:    for ENV_FILE in /etc/environment /etc/default/locale; do
/etc/rc5.d/S01cron:             if [ -n "$value" ] && [ "$ENV_FILE" = /etc/environment ]; then
/etc/rc5.d/S01cron:                 log_warning_msg "/etc/environment has been deprecated for locale information; use /etc/default/locale for $var=$value instead"
/etc/rc6.d/K01lxd:        [ -e /etc/environment ] && . /etc/environment
/etc/systemd/system/multi-user.target.wants/snapd.service:EnvironmentFile=-/etc/environment