Do not force lzma on ubuntu-core builds, the compress format default should be set universally inside initramfs-tools-ubuntu-core package instead of getting duplicated multiple times all over the place.

debian/changelog

@@ -2,6 +2,9 @@ livecd-rootfs (2.592) UNRELEASED; urgency=medium
 
   * Drop trying to mount removed maas squashfs.
   * Stop overriding initramfs compression default to lzma. LP: #1831736
+  * Do not force lzma on ubuntu-core builds, the compress format default
+    should be set universally inside initramfs-tools-ubuntu-core package
+    instead of getting duplicated multiple times all over the place.
 
  -- Dimitri John Ledkov <xnox@ubuntu.com>  Wed, 05 Jun 2019 00:02:32 +0100
 

live-build/auto/build

@@ -590,8 +590,6 @@ case $PROJECT:${SUBPROJECT:-} in
         Chroot chroot "apt-get -y autoremove"
         rm -rf chroot/boot/initrd.img* chroot/boot/vmlinu?-* chroot/lib/modules/* \
             chroot/boot/abi-* chroot/boot/System.map-* chroot/boot/config-*
-        mkdir -p chroot/etc/initramfs-tools/conf.d
-        echo "COMPRESS=lzma" >chroot/etc/initramfs-tools/conf.d/snappy-device-tarball.conf
 
         # install needed packages and the kernel itself
         Chroot chroot "apt-get -y install initramfs-tools-ubuntu-core linux-firmware xz-utils"

live-build/ubuntu-core/hooks/25-create-generic-initrd.chroot

@@ -8,10 +8,6 @@ IVER="$(dpkg -s initramfs-tools-ubuntu-core | \
 # fail the build if we did not find the snappy initrd package
 [ -n "$IVER" ] || exit 1
 
-# force lzma
-mkdir -p /etc/initramfs-tools/conf.d
-echo "COMPRESS=lzma" >/etc/initramfs-tools/conf.d/snappy-generic-initrd.conf
-
 update-initramfs.REAL -c -kcore-$IVER -v
 
 cd /boot