Index: sys/kern/uipc_sockbuf.c
===================================================================
--- sys/kern/uipc_sockbuf.c
+++ sys/kern/uipc_sockbuf.c
@@ -1520,9 +1520,6 @@
 	xsb->sb_timeo = sb->sb_timeo;
 }
 
-/* This takes the place of kern.maxsockbuf, which moved to kern.ipc. */
-static int dummy;
-SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW, &dummy, 0, "");
 SYSCTL_OID(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLTYPE_ULONG|CTLFLAG_RW,
     &sb_max, 0, sysctl_handle_sb_max, "LU", "Maximum socket buffer size");
 SYSCTL_ULONG(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW,
Index: sys/security/audit/audit_bsm_klib.c
===================================================================
--- sys/security/audit/audit_bsm_klib.c
+++ sys/security/audit/audit_bsm_klib.c
@@ -170,7 +170,6 @@
 	case KERN_JOB_CONTROL:
 	case KERN_SAVED_IDS:
 	case KERN_OSRELDATE:
-	case KERN_DUMMY:
 		return (AUE_SYSCTL_NONADMIN);
 
 	/* only treat the changeable controls as admin */
Index: sys/sys/sysctl.h
===================================================================
--- sys/sys/sysctl.h
+++ sys/sys/sysctl.h
@@ -944,7 +944,6 @@
 #define	KERN_MAXPROCPERUID	28	/* int: max processes per uid */
 #define	KERN_DUMPDEV		29	/* struct cdev *: device to dump on */
 #define	KERN_IPC		30	/* node: anything related to IPC */
-#define	KERN_DUMMY		31	/* unused */
 #define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
 #define	KERN_USRSTACK		33	/* int: address of USRSTACK */
 #define	KERN_LOGSIGEXIT		34	/* int: do we log sigexit procs? */