ostree-tmpfiles.conf: Drop var entry

We are backing away from this semantic, and moving towards
`/var` only being initialized at initial provisioning.

src/boot/ostree-tmpfiles.conf

@@ -17,7 +17,3 @@
 d /run/ostree 0755 root root -
 # https://github.com/ostreedev/ostree/issues/393
 R! /var/tmp/ostree-unlock-ovl.*
-# Automatically propagate all /var content from /usr/share/factory/var;
-# NOTE: This is now considered a mistake, and will likely be reverted.
-# As of OSTree 2024.3, content from the initial deployment is used.
-C+! /var - - - - -

tests/kolainst/destructive/var-tmpfiles.sh

@@ -1,29 +0,0 @@
-#!/bin/bash
-set -xeuo pipefail
-
-. ${KOLA_EXT_DATA}/libinsttest.sh
-
-require_writable_sysroot
-prepare_tmpdir
-
-case "${AUTOPKGTEST_REBOOT_MARK:-}" in
-  "")
-    factory_var=rootfs/usr/share/factory/var
-    mkdir -p ${factory_var}
-    cd "${factory_var}"
-    mkdir -p home/someuser
-    echo bashrc > home/someuser/.bashrc
-    chown -R 1000:1000 home/someuser
-    mkdir -m 01777 -p tmp
-    cd -
-    ostree commit -b testlint --no-bindings --selinux-policy-from-base --tree=ref="${host_refspec}" --consume --tree=dir=rootfs
-    ostree admin deploy testlint 2>err.txt
-    assert_not_file_has_content err.txt 'contains content in /var'
-
-    /tmp/autopkgtest-reboot "2"
-    ;;
-  2)
-    assert_file_has_content /home/someuser/.bashrc bashrc
-    ;;
-  *) fatal "Unexpected AUTOPKGTEST_REBOOT_MARK=${AUTOPKGTEST_REBOOT_MARK}" ;;
-esac