tests/unit/test-qmp-event: Drop superfluous mutex

Mutex @test_event_lock is held from fixture setup to teardown,
protecting global variable @test_event_data.  But tests always run one
after the other, so this is superfluous.  It also confuses Coverity.
Drop the mutex.

Fixes: CID 1527425
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20231122072456.2518816-2-armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
1 file changed