testmap: Drop Fedora pybridge scenario for Cockpit

cockpit-project/cockpit#19009 switched Fedora 38
to the pybridge for the "regular" build.

Still keep the pybridge scenario for the other projects, until cockpit
with the above PR got released and the fedora-38 image refreshed with
it.

lib/testmap.py

@@ -45,7 +45,6 @@ def contexts(image, *scenarios: Iterable[str]):
             # this runs coverage, reports need the whole test suite
             *contexts(TEST_OS_DEFAULT, ['devel']),
             *contexts(TEST_OS_DEFAULT, ['firefox'], COCKPIT_SCENARIOS),
-            *contexts(TEST_OS_DEFAULT, ['pybridge'], COCKPIT_SCENARIOS),
             *contexts('centos-8-stream', ['pybridge'], COCKPIT_SCENARIOS),
             # no udisks on CoreOS → skip storage
             *contexts('fedora-coreos', COCKPIT_SCENARIOS - {'storage'}),