remove unused code regarding imports and exports
remove unused code regarding imports and exports

mairdl/jabref,obraliar/jabref,mairdl/jabref,mredaelli/jabref,Braunch/jabref,obraliar/jabref,Siedlerchr/jabref,Mr-DLib/jabref,grimes2/jabref,oscargus/jabref,Siedlerchr/jabref,sauliusg/jabref,sauliusg/jabref,tschechlovdev/jabref,shitikanth/jabref,ayanai1/jabref,Mr-DLib/jabref,shitikanth/jabref,motokito/jabref,zellerdev/jabref,shitikanth/jabref,bartsch-dev/jabref,shitikanth/jabref,oscargus/jabref,jhshinn/jabref,grimes2/jabref,JabRef/jabref,obraliar/jabref,motokito/jabref,mredaelli/jabref,mairdl/jabref,mairdl/jabref,shitikanth/jabref,ayanai1/jabref,zellerdev/jabref,Braunch/jabref,JabRef/jabref,ayanai1/jabref,JabRef/jabref,oscargus/jabref,tschechlovdev/jabref,grimes2/jabref,Braunch/jabref,bartsch-dev/jabref,tschechlovdev/jabref,zellerdev/jabref,tobiasdiez/jabref,tobiasdiez/jabref,grimes2/jabref,zellerdev/jabref,obraliar/jabref,Mr-DLib/jabref,sauliusg/jabref,bartsch-dev/jabref,mredaelli/jabref,Mr-DLib/jabref,motokito/jabref,sauliusg/jabref,tschechlovdev/jabref,obraliar/jabref,jhshinn/jabref,jhshinn/jabref,tschechlovdev/jabref,jhshinn/jabref,mairdl/jabref,oscargus/jabref,Braunch/jabref,mredaelli/jabref,mredaelli/jabref,Siedlerchr/jabref,jhshinn/jabref,ayanai1/jabref,oscargus/jabref,bartsch-dev/jabref,ayanai1/jabref,tobiasdiez/jabref,zellerdev/jabref,bartsch-dev/jabref,Braunch/jabref,JabRef/jabref,Siedlerchr/jabref,tobiasdiez/jabref,grimes2/jabref,Mr-DLib/jabref,motokito/jabref,motokito/jabref