apm.8: Don't claim that zzz(8) invokes apm(8)

Fixes:		aba599a6cc ("zzz: Rewrite to use new power device")

usr.sbin/apm/apm.8

@@ -9,7 +9,7 @@
 .\" the author assume any responsibility for damages incurred with its
 .\" use.
 .\"
-.Dd November 12, 2025
+.Dd September 23, 2026
 .Dt APM 8 i386
 .Os
 .Sh NAME
@@ -111,8 +111,6 @@ output of
 tells what your laptop claims to support.
 .It Fl z
 Suspend the system.
-It is used by
-.Xr zzz 8 .
 .El
 .Pp
 If no options are specified,