Keep Dolt out of operational conformance matrices [skip ci]

Author: TonisOrmisson

tests/test_official_conformance.py

@@ -277,7 +277,6 @@ def test_official_manifest_round_trips_through_sqlite(
         ("OPENSTATSPEC_POSTGRES_URL", "postgresql"),
         ("OPENSTATSPEC_MYSQL_URL", "mysql"),
         ("OPENSTATSPEC_MARIADB_URL", "mariadb"),
-        ("OPENSTATSPEC_DOLT_URL", "dolt"),
     ],
 )
 @pytest.mark.parametrize(("fixture", "source"), _round_trip_fixtures())
@@ -361,7 +360,6 @@ def test_official_preflight_failure_is_atomic_and_diagnostic(tmp_path: Path) ->
         ("OPENSTATSPEC_POSTGRES_URL", "postgresql"),
         ("OPENSTATSPEC_MYSQL_URL", "mysql"),
         ("OPENSTATSPEC_MARIADB_URL", "mariadb"),
-        ("OPENSTATSPEC_DOLT_URL", "dolt"),
     ],
 )
 def test_official_preflight_failure_through_server_profiles(