Remove hard-coded disabling of debug logs

Instead, set the default level of all logs to QtWarningMsg.

The call to setFilterRules overrides the user preferences in qtlogging.ini.

Change-Id: Id5f6cd550d14ff7f45ae04c5d3110e0bafb0f072
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/libs/ssh/sshlogging.cpp

@@ -27,6 +27,6 @@
 
 namespace QSsh {
 namespace Internal {
-Q_LOGGING_CATEGORY(sshLog, "qtc.ssh")
+Q_LOGGING_CATEGORY(sshLog, "qtc.ssh", QtWarningMsg)
 } // namespace Internal
 } // namespace QSsh