updated _maximize_pane() that stopped working with tmux 3.2 (2)

fixed SC2014 violation

SC2034 (warning): current_pane_height appears unused. Verify use (or export if used externally)

.tmux.conf

@@ -267,7 +267,6 @@ run 'cut -c3- "$TMUX_CONF" | sh -s _apply_configuration'
 #
 #   if [ -z "$restore" ]; then
 #     [ "$(tmux list-panes -t "$current_session:" | wc -l | sed 's/^ *//g')" -eq 1 ] && tmux display "Can't maximize with only one pane" && return
-#     current_pane_height=$(tmux display -t "$current_pane" -p "#{pane_height}")
 #     info=$(tmux new-window -t "$current_session:" -F "#{session_name}:#{window_index}.#{pane_id}" -P "maximized... 2>/dev/null & \"$TMUX_PROGRAM\" ${TMUX_SOCKET:+-S \"$TMUX_SOCKET\"} setw -t \"$current_session:\" remain-on-exit on; printf \"\\033[\$(tput lines);0fPane has been maximized, press <prefix>+ to restore\n\" '$current_pane'")
 #     session_window=${info%.*}
 #     new_pane=${info#*.}