systemd-sysv-install: unset ROOT rather than setting it to ""

Follow-up for #8264.

It's cleaner to pass no env var at all to forked off processes rather
than an empty one.

diff --git a/src/systemctl/systemd-sysv-install.SKELETON b/src/systemctl/systemd-sysv-install.SKELETON
index 2c494f169b13b28b4df84786e4999628fd2b889c..8c16cf99913f598ccb114ec5eaa72ace54a3923d 100755 (executable)
--- a/src/systemctl/systemd-sysv-install.SKELETON
+++ b/src/systemctl/systemd-sysv-install.SKELETON
@@ -11,7 +11,7 @@ usage() {
     exit 1
 }
 
-ROOT=
+unset ROOT
 
 # parse options
 eval set -- "$(getopt -o r: --long root: -- "$@")"