Remove expired ports:
2021-01-14 net-im/telegram: Upstream unmaintained; please migrate to net-im/telegram-cli
2021-01-14 science/dlpoly-classic: MASTERSITE gone; possibly replaced by https://gitlab.com/DL_POLY_Classic/dl_poly?
2021-01-15 security/py-gtts-token: Obsolete, please use audio/py-gtts instead