Unused classes in src

There are some unused classes in opal that should be removed.

class	@kraus	@adelmann	@frey_m	@snuverink_j	@ext-rogers_c
Algorithms/ParallelTTracker	❌	❌	❌	❌	❌
AbstractObjects/Editor	👍	👍	👍	👍	👍
Algorithms/AbstractMapper	👍	👍	👍	👍	👍
Algorithms/LinearMapper	👍	👍	👍	👍	👍
Algorithms/Mapper	👍	👍	👍	👍	👍
Algorithms/rbendmap	👍	👍	👍	👍	👍
Algorithms/Surveyor	👍	👍	👍	👍	👍
Algorithms/ThinMapper	👍	👍	👍	👍	👍
Algorithms/ThinTracker	👍	👍	👍	👍	👍
BasicActions/Dump	👍	👍	👍	👍	👍
BasicActions/Save	👍	👍	👍	👍	👍
BasicActions/Show	👍	👍	👍	👍	👍
BasicActions/What	👍	👍	👍	👍	👍
BeamlineGeometry/OffsetGeometry	👍	👍	👍	👍	👍
BeamlineGeometry/SRotatedGeometry	👍	👍	👍	👍	👍
Construction/ElementFactory	👍	👍	👍	👍	👍
Construction/Factory	👍	👍	👍	👍	👍
Elements/AttCell	👍	👍	👍	👍	👍
Elements/OpalHMonitor	👍	👍	👍	👍	👍
Elements/OpalVMonitor	👍	👍	👍	👍	👍
Elements/OpalInstrument	👍	👍	👍	👍	👍
Elements/OpalParallelPlate	👍	👍	👍	👍	👍
Elements/OpalPatch	👍	👍	👍	👍	👍
Elements/OpalSplineTimeDependence	❌	❌	👍	👍	❌
Elements/OpalSRot	👍	👍	👍	👍	👍
Elements/OpalYRot	👍	👍	👍	👍	👍
Elements/OpalSeparator	👍	👍	👍	👍	👍
Fields/Interpolation/ConstEField	👍	👍	👍	👍	👍
Fields/Interpolation/EDipoleField	👍	👍	👍	👍	👍
Fields/Interpolation/TwoDGrid	❌	❌	👍	👍	❌
FixedAlgebra/FNormalForm	👍	👍	👍	👍	👍
FixedAlgebra/FStaticFP	👍	👍	👍	👍	👍
FixedAlgebra/LinearMath	👍	👍	👍	👍	👍
FixedAlgebra/TransportMath	👍	👍	👍	👍	👍
Tables/AttList	👍	👍	👍	👍	👍
Tables/AttWriter	👍	👍	👍	👍	👍
Tables/Flatten	👍	👍	👍	👍	👍
Tables/Insertion	👍	👍	👍	👍	👍
Tables/Period	👍	👍	👍	👍	👍
Tables/Survey	👍	👍	👍	👍	👍
Tables/Twiss	👍	👍	👍	👍	👍
Track/TrackStart	👍	👍	👍	👍	👍
Track/TrackSave	👍	👍	👍	👍	👍
AbsBeamline/BeamBeam	👍	👍	👍	👍	👍
AbsBeamline/Diagnostic	👍	👍	👍	👍	👍
AbsBeamline/ElementImage	👍	👍	👍	👍	👍
AbsBeamline/Integrator	👍	👍	👍	👍	👍
AbsBeamline/Lambertson	👍	👍	👍	👍	👍
AbsBeamline/ParallelPlate	👍	👍	👍	👍	👍
AbsBeamline/Patch	👍	👍	👍	👍	👍
AbsBeamline/RFQuadrupole	👍	👍	👍	👍	👍
AbsBeamline/Separator	👍	👍	👍	👍	👍
Algorithms/NilTracker	👍	👍	👍	👍	👍
Algorithms/ThickMapper	👍	👍	👍	👍	👍
BeamlineCore/BeamBeamRep	👍	👍	👍	👍	👍
BeamlineCore/ParallelPlateRep	👍	👍	👍	👍	👍
BeamlineCore/PatchRep	👍	👍	👍	👍	👍
BeamlineCore/SeparatorRep	👍	👍	👍	👍	👍
BeamlineCore/XMonitorRep	👍	👍	👍	👍	👍
BeamlineCore/YMonitorRep	👍	👍	👍	👍	👍
Expressions/ARefAttr	👍	👍	👍	👍	👍

Please have a look at these files and please give your ok, if the files can be deleted.