removed the not working dokk examples

examples/code_fragments/dokk/KEYS

examples/code_fragments/dokk/config.py

examples/code_fragments/dokk/datafiles/dengue/level.ini

examples/code_fragments/dokk/datafiles/dengue/levelF.ini

examples/code_fragments/dokk/datafiles/dengue/ligand.sdf

examples/code_fragments/dokk/datafiles/dengue/protein.pdb

examples/code_fragments/dokk/datafiles/dengue/surface.face

examples/code_fragments/dokk/datafiles/dengue/surface.vert

examples/code_fragments/dokk/datafiles/dengue/top_ten.ini

examples/code_fragments/dokk/datafiles/glyoxalase/level.ini

examples/code_fragments/dokk/datafiles/glyoxalase/levelF.ini

examples/code_fragments/dokk/datafiles/glyoxalase/ligand.sdf

...ples/code_fragments/dokk/datafiles/glyoxalase/protein.pdb

...les/code_fragments/dokk/datafiles/glyoxalase/surface.face

...les/code_fragments/dokk/datafiles/glyoxalase/surface.vert

...ples/code_fragments/dokk/datafiles/glyoxalase/top_ten.ini

examples/code_fragments/dokk/datafiles/hud.ini

examples/code_fragments/dokk/datafiles/hudF.ini

examples/code_fragments/dokk/datafiles/retinol/level.ini

examples/code_fragments/dokk/datafiles/retinol/levelF.ini