test: remove extension from /var/lib/extensions at the end of the test

Otherwise it remains there, and another test case accidentally
uses it on refresh, which then makes another later test fail,
as the hierarchy is already merged:

[  203.969708] TEST-50-DISSECT.sh[890]: + systemd-sysext status
[  203.981831] TEST-50-DISSECT.sh[2795]: HIERARCHY EXTENSIONS SINCE
[  203.982196] TEST-50-DISSECT.sh[2795]: /opt      app0       Mon 2025-09-08 11:49:11 UTC
[  203.982551] TEST-50-DISSECT.sh[2795]: /usr      app0       Mon 2025-09-08 11:49:11 UTC

[  204.119772] TEST-50-DISSECT.sh[2799]: Hierarchy '/usr' is already merged.

Fixes https://github.com/systemd/systemd/issues/38282

diff --git a/test/units/TEST-50-DISSECT.sysext.sh b/test/units/TEST-50-DISSECT.sysext.sh
index 5302314d2617361bf50d007a1759722523e02b0b..3c8c7de8c1ce634ae0336f857aec877d63d78a20 100755 (executable)
--- a/test/units/TEST-50-DISSECT.sysext.sh
+++ b/test/units/TEST-50-DISSECT.sysext.sh
@@ -1106,5 +1106,6 @@ systemd-sysext unmerge
 test ! -f /usr/lib/systemd/system/some_file
 mountpoint /usr/share
 umount /usr/share
+rm -f /var/lib/extensions/app0.raw
 
 exit 0