wrap Core: rm unused fct create_default_plotter

Wrap/Swig/libBornAgainCore.i

auto/Wrap/libBornAgainBase_wrap.cpp

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp

auto/Wrap/libBornAgainDevice_wrap.cpp

auto/Wrap/libBornAgainFit_wrap.cpp

auto/Wrap/libBornAgainParam_wrap.cpp

auto/Wrap/libBornAgainSample_wrap.cpp