Trigger/TrigAlgorithms: Package cleanup

Cleanup of several packages under Trigger/TrigAlgorithms:

• cleanup cmake configuration
• enable flake8
• delete obsolete job options
• remove CLHEP dependency where applicable

Trigger/TrigAlgorithms/TrigFastTrackFinder/python/TrigFastTrackFinder_Config.py

@@ -171,7 +171,7 @@ class TrigFastTrackFinderBase(TrigFastTrackFinder):
         assert(remapped_type is not None)
 
         #Global keys/names for collections 
-        from TrigInDetConfig.InDetTrigCollectionKeys import TrigTRTKeys, TrigPixelKeys, TrigSCTKeys
+        from TrigInDetConfig.InDetTrigCollectionKeys import TrigPixelKeys, TrigSCTKeys
 
 
         self.useNewLayerNumberScheme = True