adjkerntz(8): revert "detect extra jailed invokation to keep logs clean"

This reverts commit 048ce0876f
due to bugs. Reworked change will be committed later hopefully.

sbin/adjkerntz/adjkerntz.c

@@ -46,7 +46,6 @@ __FBSDID("$FreeBSD$");
  * with Garrett Wollman and Bruce Evans fixes.
  *
  */
-#include <errno.h>
 #include <stdio.h>
 #include <signal.h>
 #include <stdlib.h>
@@ -160,12 +159,6 @@ main(int argc, char *argv[])
 
 	len = sizeof(kern_offset);
 	if (sysctlbyname("machdep.adjkerntz", &kern_offset, &len, NULL, 0) == -1) {
-		if (errno == EPERM && !init && geteuid() == 0)
-			/*
-			 * Surplus call from jailed root crontab.
-			 * Avoid spamming logs.
-			 */
-			return 1;
 		syslog(LOG_ERR, "sysctl(\"machdep.adjkerntz\"): %m");
 		return 1;
 	}