NetBSD: Remove *_MAXID constants and AT_SUN_LDPGSIZE

These assorted constants may have existed at some point but I can't find
any reference to them in the source repo. Remove them now.

(backport <#4782>)
(cherry picked from commit 17727db)

Author: tgross35

libc-test/semver/netbsd.txt

@@ -179,7 +179,6 @@ CTL_HW
 CTL_IPPROTO_IPSEC
 CTL_KERN
 CTL_MACHDEP
-CTL_MAXID
 CTL_MAXNAME
 CTL_MMAP
 CTL_NET
@@ -532,7 +531,6 @@ KERN_LOGSIGEXIT
 KERN_LWP
 KERN_MAPPED_FILES
 KERN_MAXFILES
-KERN_MAXID
 KERN_MAXPARTITIONS
 KERN_MAXPHYS
 KERN_MAXPROC
@@ -726,7 +724,6 @@ NANOSECOND
 NET_RT_DUMP
 NET_RT_FLAGS
 NET_RT_IFLIST
-NET_RT_MAXID
 NET_RT_OIFLIST
 NET_RT_OOIFLIST
 NET_RT_OOOIFLIST

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -977,7 +977,6 @@ pub const AT_RGID: c_int = 2003;
 pub const AT_SUN_LDELF: c_int = 2004;
 pub const AT_SUN_LDSHDR: c_int = 2005;
 pub const AT_SUN_LDNAME: c_int = 2006;
-pub const AT_SUN_LDPGSIZE: c_int = 2007;
 pub const AT_SUN_PLATFORM: c_int = 2008;
 pub const AT_SUN_HWCAP: c_int = 2009;
 pub const AT_SUN_IFLUSH: c_int = 2010;
@@ -1219,7 +1218,6 @@ pub const NET_RT_OOOIFLIST: c_int = 3;
 pub const NET_RT_OOIFLIST: c_int = 4;
 pub const NET_RT_OIFLIST: c_int = 5;
 pub const NET_RT_IFLIST: c_int = 6;
-pub const NET_RT_MAXID: c_int = 7;
 
 pub const PF_OROUTE: c_int = AF_OROUTE;
 pub const PF_ARP: c_int = AF_ARP;
@@ -1701,7 +1699,6 @@ pub const CTL_PROC: c_int = 10;
 pub const CTL_VENDOR: c_int = 11;
 pub const CTL_EMUL: c_int = 12;
 pub const CTL_SECURITY: c_int = 13;
-pub const CTL_MAXID: c_int = 14;
 pub const KERN_OSTYPE: c_int = 1;
 pub const KERN_OSRELEASE: c_int = 2;
 pub const KERN_OSREV: c_int = 3;
@@ -1786,7 +1783,6 @@ pub const KERN_ARND: c_int = 81;
 pub const KERN_SYSVIPC: c_int = 82;
 pub const KERN_BOOTTIME: c_int = 83;
 pub const KERN_EVCNT: c_int = 84;
-pub const KERN_MAXID: c_int = 85;
 pub const KERN_PROC_ALL: c_int = 0;
 pub const KERN_PROC_PID: c_int = 1;
 pub const KERN_PROC_PGRP: c_int = 2;