fa0d0ff6e1bee60fde63724ae28a51aac5a94d4a Remove unused bits from the service flags enum (MarcoFalke)
Pull request description:
Remove all bits that have no BIP specification nor can be observed on the active network
Backport of Core PR16380
I'm putting this up on the assumption that xthin was a BU only feature
that we can safely remove now that we don't support BCHN-chain anymore.