@classmethod
    def delete(cls, repo, path):
        """Delete the reference at the given path

        :param repo:
            Repository to delete the reference from

        :param path:
            Short or full path pointing to the reference, i.e. refs/myreference
            or just "myreference", hence 'refs/' is implied.
            Alternatively the symbolic reference to be deleted"""
        full_ref_path = cls.to_full_path(path)
        abs_path = join(repo.git_dir, full_ref_path)
        if exists(abs_path):
            os.remove(abs_path)
        else:
            # check packed refs
            pack_file_path = cls._get_packed_refs_path(repo)
            try:
                reader = open(pack_file_path, 'rb')
            except (OSError, IOError):
                pass  # it didnt exist at all
            else:
                new_lines = list()
                made_change = False
                dropped_last_line = False
                for line in reader:
                    # keep line if it is a comment or if the ref to delete is not
                    # in the line
                    # If we deleted the last line and this one is a tag-reference object,
                    # we drop it as well
                    line = line.decode(defenc)
                    if (line.startswith('#') or full_ref_path not in line) and \
                            (not dropped_last_line or dropped_last_line and not line.startswith('^')):
                        new_lines.append(line)
                        dropped_last_line = False
                        continue
                    # END skip comments and lines without our path

                    # drop this line
                    made_change = True
                    dropped_last_line = True
                # END for each line in packed refs
                reader.close()

                # write the new lines
                if made_change:
                    # write-binary is required, otherwise windows will
                    # open the file in text mode and change LF to CRLF !
                    open(pack_file_path, 'wb').writelines(l.encode(defenc) for l in new_lines)
                # END write out file
            # END open exception handling
        # END handle deletion

        # delete the reflog
        reflog_path = RefLog.path(cls(repo, full_ref_path))
        if os.path.isfile(reflog_path):
            os.remove(reflog_path)
        # END remove reflog
dataset/ETHPy150Open gitpython-developers/GitPython/git/refs/symbolic.py/SymbolicReference.delete/original