Revert "FIX: Fixed Neuron class structure"

src/Neuron/Neuron.h

src/Neuron/NeuronBinary.cpp

src/Neuron/NeuronBinary.h

src/Neuron/NeuronConstant.h

src/Neuron/NeuronLinear.h

src/Neuron/NeuronLogistic.cpp

src/Neuron/NeuronLogistic.h

src/Neuron/NeuronLogisticSerialization.h

src/Solvers/DESolver.cpp