Revert /dev sharing improvements.

debian/changelog

@@ -1,9 +1,14 @@
 livecd-rootfs (2.732) UNRELEASED; urgency=medium
 
+  [ Michael Hudson-Doyle ]
   * lb_chroot_layered: fix quoting when searching for
     trusted.overlay.opaque
 
- -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Fri, 30 Jul 2021 11:56:01 +1200
+  [ Łukasz 'sil2100' Zemczak ]
+  * Revert previous change of fixing /dev sharing - this causes weird
+    autopkgtest issues.
+
+ -- Łukasz 'sil2100' Zemczak <lukasz.zemczak@ubuntu.com>  Mon, 02 Aug 2021 22:10:11 +0200
 
 livecd-rootfs (2.731) impish; urgency=medium
 

live-build/functions

@@ -132,7 +132,6 @@ setup_mountpoint() {
     fi
 
     mount --rbind /dev "$mountpoint/dev"
-    mount --make-rslave "$mountpoint/dev"
     mount proc-live -t proc "$mountpoint/proc"
     mount sysfs-live -t sysfs "$mountpoint/sys"
     mount securityfs -t securityfs "$mountpoint/sys/kernel/security"