removes json module dependency
removes json module dependency

Siedlerchr/jabref,sauliusg/jabref,JabRef/jabref,Siedlerchr/jabref,sauliusg/jabref,sauliusg/jabref,Siedlerchr/jabref,JabRef/jabref,JabRef/jabref,JabRef/jabref,Siedlerchr/jabref,sauliusg/jabref