tools/sched_ext: scx_central: Remove unused '-p' option

The '-p' option is defined in getopt() but not handled in the switch
statement or documented in the help text. Providing '-p' currently
triggers the default error path.

Remove it to sync the optstring with the actual implementation.

Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

Author: EricccTaiwan

tools/sched_ext/scx_central.c

@@ -66,7 +66,7 @@ int main(int argc, char **argv)
 	assert(skel->rodata->nr_cpu_ids > 0);
 	assert(skel->rodata->nr_cpu_ids <= INT32_MAX);
 
-	while ((opt = getopt(argc, argv, "s:c:pvh")) != -1) {
+	while ((opt = getopt(argc, argv, "s:c:vh")) != -1) {
 		switch (opt) {
 		case 's':
 			skel->rodata->slice_ns = strtoull(optarg, NULL, 0) * 1000;