The test `maintenance.auto config option` will fail if any preceding test
has run `git maintenance register` since that turns `maintenance.auto` off
for that repository and later calls to `unregister` will not turn it back
to the default `true` value.

Start with a fresh repository in this test.

Signed-off-by: Kristoffer Haugsbakk <redacted>
---

Notes (series):
    I found this after publishing the series.

 t/t7900-maintenance.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index bc417b518b..dbc5e1eb44 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh

@@ -55,6 +55,8 @@ test_expect_success 'run [--auto|--quiet]' '
 '
 
 test_expect_success 'maintenance.auto config option' '
+	rm -rf .git &&
+	git init &&
 	GIT_TRACE2_EVENT="$(pwd)/default" git commit --quiet --allow-empty -m 1 &&
 	test_subcommand git maintenance run --auto --quiet <default &&
 	GIT_TRACE2_EVENT="$(pwd)/true" \

-- 
2.42.0.2.g879ad04204