desktop-shell: Remove unused variable in panel_create

Signed-off-by: Raúl Peñacoba <raul.mikaop.zelda@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>

clients/desktop-shell.c

@@ -591,7 +591,6 @@ panel_create(struct desktop *desktop)
 {
 	struct panel *panel;
 	struct weston_config_section *s;
-	char *clock_format_option = NULL;
 
 	panel = xzalloc(sizeof *panel);
 
@@ -611,8 +610,6 @@ panel_create(struct desktop *desktop)
 	if (panel->clock_format != CLOCK_FORMAT_NONE)
 		panel_add_clock(panel);
 
-	free (clock_format_option);
-
 	s = weston_config_get_section(desktop->config, "shell", NULL, NULL);
 	weston_config_section_get_color(s, "panel-color",
 					&panel->color, 0xaa000000);