Removes intermediate files.

def remove_files(self):
        """Removes intermediate files."""
        file_list = ["molecule.svg","lig.pdb","HIS.pdb","PHE.pdb","TRP.pdb","TYR.pdb","lig.mol","test.xtc"]
        for residue in self.topol_data.dict_of_plotted_res.keys():
            file_list.append(residue[1]+residue[2]+".svg")
        for f in file_list:
            if os.path.isfile(f)==True:
                os.remove(f)