Make sure to remove any initramfs that was generated in a minimized

image.

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.408.22) UNRELEASED; urgency=medium
+
+  * Make sure to remove any initramfs that was generated in a minimized
+    image.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Sat, 21 Oct 2017 20:52:38 -0700
+
 livecd-rootfs (2.408.21) xenial; urgency=medium
 
   [ Balint Reczey ]

live-build/auto/build

@@ -158,6 +158,14 @@ EOF
 
 	lb chroot "$@"
 
+	if [ "${SUBPROJECT:-}" = minimized ]; then
+		# and if initramfs-tools was configured before our kernel,
+		# /etc/kernel/postinst.d/initramfs-tools will have created
+		# an initramfs despite the generic dpkg-divert; so remove it
+		# here.
+		rm -f chroot/boot/initrd.img-*
+	fi
+
 	if [ -f config/oem-config-preinstalled ]; then
 
 # This is cargo-culted almost verbatim (with some syntax changes for