I'm extremely confused by this. I've deleted a reference to Extension:Parsoid which is old, outdated and archived, but the configuration of this page is using:
wfLoadExtension( 'Parsoid', "$PARSOID_INSTALL_DIR/extension.json" );
This page was created on 2019. The Parsoid extension was deprecated long ago. How could it be possible? Either this configuration is utterly outdated (it was already outdated on creation!) or there's some other hidden Parsoid extension that I'm not aware of.
@Cscott, please explain