get rid of the who -m ssh session test

I dont like executing a binary in a fast startup script. Lets see
if there are a lot of sessions in the wild that dont use the SSH_TTY
env var

shell-integration/zsh/kitty-integration

@@ -235,9 +235,6 @@ _ksi_deferred_init() {
         builtin local is_ssh_session="n"
         if [[ -n "$SSH_TTY$SSH2_TTY" ]]; then
             is_ssh_session="y";
-        elif [[ -n "$(builtin command -v who)" ]]; then
-            # OpenSSH's sshd creates entries in utmp for every login so use those
-            [[ "$(builtin command who -m 2> /dev/null)" =~ "\([a-fA-F.:0-9]+\)$" ]] && is_ssh_session="y";
         fi
         
         if [[ "$is_ssh_session" == "y" ]]; then