remove file

examples/dssp_sa.py

-from ost.bindings import dssp
-ent=io.LoadMMCIF('1ake.cif')
-dssp.AssignDSSP(ent, extract_burial_status=True)
-for chain in ent.chains:
-  if chain.is_polypeptide:
-    for res in chain.residues:
-      print res.GetFloatProp('relative_solvent_accessibility')