def remove_temporary_source(self):<EOL>
if self.source_dir and os.path.exists(<EOL>os.path.join(self.source_dir, PIP_DELETE_MARKER_FILENAME)):<EOL><INDENT>logger.debug('<STR_LIT>', self.source_dir)<EOL>rmtree(self.source_dir)<EOL><DEDENT>self.source_dir = None<EOL>self._temp_build_dir.cleanup()<EOL>self.build_env.cleanup()<EOL>
Remove the source files from this requirement, if they are marked
        for deletion