dockertests cassandane: skip nothing!

Some trial runs show that these are all passing now.

cassandane/cassandane.ini.dockertests

@@ -43,16 +43,12 @@
 [cassandane]
 rootdir = /tmp/cass
 cleanup = no
-# We skip some tests that are either long-time known failures, or
-# are brittle and fail sporadically, to keep the CI integration
-# useful.
-#
-# This list last reviewed on 2020-08-07
+
+# If we need do, we can put a list of (space-delimited) tests in this setting,
+# and those tests will be skipped.  In the past, we've used it for tests that
+# don't pass reliably or can't be run on our test automation platform.
 #
-# The final three (Sieve imip and Caldav implicit allday) fail on our current
-# Docker image, and we'll remove them from here when we upgrade the Docker
-# image.
-suppress = Rename.rename_inbox JMAPBackup Sieve.snooze_tzid MboxEvent.tls_login_event Sieve.imip_reply_override Sieve.imip_reply_override_google Caldav.invite_switch_implicit_allday_to_dtend
+# suppress = 
 
 [valgrind]