And also remove check for DtlsV1_2OrGreater for negotiated
session protocol, since it must have been resolved to a specific
protocol by this point.
Fixes: QTBUG-100154
Pick-to: 6.3 6.2
Change-Id: I3aec31faed8b9cb22be0062da057c62864eba34f
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>