Unused classes in OPAL

The following files / classes are unused as far as I can see:

• ippl/src/AppTypes/GenVektor.h
• ippl/src/Utility/IplCounter.h
• ippl/src/Utility/RNGBitReverse.h
• ippl/src/Utility/RNGLattice.h
• src/Classic/Algebra/NormalForm.h / cpp
• src/Classic/Algebra/ComplexEigen
• src/Classic/Algebra/DoubleEigen
• src/Classic/FixedAlgebra/FComplexEigen
• src/Classic/Utilities/NormalFormError
• src/Lines/FlatWriter.h / cpp
• src/Utilities/InverseGauss
• src/Utilities/TpsWerrf.h / cpp
• optimizer/Comm/Splitter/GeometricStrategy.h
• optimizer/Comm/Splitter/RandomStrategy.h

@adelmann : can these be deleted?