Clean up legacy xAODCnv configs

Event/xAOD/xAODBTaggingCnv/share/xAODBTaggingReader_jobOptions.py

-# $Id: xAODBTaggingReader_jobOptions.py 583111 2014-02-13 17:31:49Z christos $
-
-# Set up the reading of the input xAOD:
-FNAME = "xAOD.pool.root"
-import AthenaPoolCnvSvc.ReadAthenaPool
-ServiceMgr.EventSelector.InputCollections = [ FNAME ]
-
-# Access the algorithm sequence:
-from AthenaCommon.AlgSequence import AlgSequence
-theJob = AlgSequence()
-
-# Add the xAOD reader algorithm(s):
-from xAODBTaggingCnv.xAODBTaggingCnvConf import xAODReader__BTaggingReader
-
-alg = xAODReader__BTaggingReader()
-alg.OutputLevel = DEBUG
-theJob += alg
-
-# Do some additional tweaking:
-from AthenaCommon.AppMgr import theApp
-ServiceMgr.MessageSvc.OutputLevel = INFO
-ServiceMgr.MessageSvc.defaultLimit = 1000000