mtree: Remove unused MANSUBDIRs

Approved by:	re (cperciva)
MFC after:	3 days
Fixes:		809504f331 ("man: Kill off MANSUBDIRs")
Reviewed by:	ziaee
Differential Revision:	https://reviews.freebsd.org/D57029

(cherry picked from commit 1dc1b95163)
(cherry picked from commit 6146c5962e)

ObsoleteFiles.inc

@@ -52,6 +52,7 @@
 # done
 
 # 20260503: Kill off MANSUBDIRs
+OLD_DIRS+=usr/share/man/man4/amd64
 OLD_FILES+=usr/share/man/man8/amd64/apm.8.gz
 OLD_FILES+=usr/share/man/man8/amd64/apmconf.8.gz
 OLD_FILES+=usr/share/man/man8/i386/apmd.8.gz

etc/mtree/BSD.usr.dist

@@ -503,8 +503,6 @@
             man4
                 aarch64
                 ..
-                amd64
-                ..
                 arm
                 ..
                 i386
@@ -519,12 +517,6 @@
             man7
             ..
             man8
-                amd64
-                ..
-                i386
-                ..
-                powerpc
-                ..
             ..
             man9
             ..