[ATLASRECTS-7450] Cleaned up JetFitterTag code

As mentioned in ATLASRECTS-7450 that JetFitterTag has been removed from BTagging configuration code, this MR cleans up the python code and C++ code that are only called in the JetFitterTag.

Tagging @duperrin , @ligang and @dguest .

PhysicsAnalysis/JetTagging/JetTagTools/src/components/JetTagTools_entries.cxx

@@ -4,15 +4,12 @@
 
 #include "JetTagTools/NewLikelihoodTool.h"
 #include "JetTagTools/TrackSelector.h"
-#include "JetTagTools/JetFitterTag.h"
 
-#include "JetTagTools/JetFitterNtupleWriter.h"
 #include "JetTagTools/JetFitterVariablesFactory.h"
 #include "JetTagTools/MSVVariablesFactory.h"
 
 #include "JetTagTools/MultivariateTagManager.h"
 #include "JetTagTools/TagNtupleDumper.h"
-#include "JetTagTools/JetFitterNNTool.h"
 #include "JetTagTools/JetFitterDummyClassifier.h"
 #include "JetTagTools/JetFitterInputWriter.h"
 
@@ -30,13 +27,10 @@ DECLARE_COMPONENT( Analysis::SVTag )
 DECLARE_COMPONENT( Analysis::MultiSVTag )
 DECLARE_COMPONENT( Analysis::NewLikelihoodTool )
 DECLARE_COMPONENT( Analysis::TrackSelector )
-DECLARE_COMPONENT( Analysis::JetFitterTag )
-DECLARE_COMPONENT( Analysis::JetFitterNtupleWriter )
 DECLARE_COMPONENT( Analysis::JetFitterVariablesFactory )
 DECLARE_COMPONENT( Analysis::MSVVariablesFactory )
 DECLARE_COMPONENT( Analysis::TagNtupleDumper )
 DECLARE_COMPONENT( Analysis::MultivariateTagManager )
-DECLARE_COMPONENT( Analysis::JetFitterNNTool )
 DECLARE_COMPONENT( Analysis::JetFitterDummyClassifier )
 DECLARE_COMPONENT( Analysis::JetFitterInputWriter )
 DECLARE_COMPONENT( Analysis::SVForIPTool )