Revert "install-multi-user.sh: _sudo: add proxy variables to sudo"

This reverts commit 24fd7e2755.

scripts/install-multi-user.sh

@@ -58,31 +58,6 @@ readonly EXTRACTED_NIX_PATH="$(dirname "$0")"
 
 readonly ROOT_HOME=~root
 
-readonly PROXY_ENVIRONMENT_VARIABLES=(
-    http_proxy
-    https_proxy
-    ftp_proxy
-    no_proxy
-    HTTP_PROXY
-    HTTPS_PROXY
-    FTP_PROXY
-    NO_PROXY
-)
-
-SUDO_EXTRA_ENVIRONMENT_VARIABLES=()
-
-setup_sudo_extra_environment_variables() {
-    local i=${#SUDO_EXTRA_ENVIRONMENT_VARIABLES[@]}
-    for variable in "${PROXY_ENVIRONMENT_VARIABLES[@]}"; do
-        if [ "x${!variable:-}" != "x" ]; then
-            SUDO_EXTRA_ENVIRONMENT_VARIABLES[i]="$variable=${!variable}"
-            i=$((i + 1))
-        fi
-    done
-}
-
-setup_sudo_extra_environment_variables
-
 if [ -t 0 ] && [ -z "${NIX_INSTALLER_YES:-}" ]; then
     readonly IS_HEADLESS='no'
 else
@@ -386,7 +361,7 @@ _sudo() {
     if is_root; then
         env "$@"
     else
-        sudo "${SUDO_EXTRA_ENVIRONMENT_VARIABLES[@]}" "$@"
+        sudo "$@"
     fi
 }