AthSequencer: cleanup and enable thread-checker
Cleanup AthSequencer, i.e. remove the obsolete FPE handling code (we are using FPEAuditor instead). Also remove the "Atomic" property which does not have any effect. Enable thread-checker.
Cleanup AthSequencer, i.e. remove the obsolete FPE handling code (we are using FPEAuditor instead). Also remove the "Atomic" property which does not have any effect. Enable thread-checker.