delete `Stdin::split` forwarder Part of #87096. Delete the `Stdin::split` forwarder because it's seen as too niche to expose at this level. `@rustbot` label T-libs-api A-io
delete `Stdin::split` forwarder Part of #87096. Delete the `Stdin::split` forwarder because it's seen as too niche to expose at this level. `@rustbot` label T-libs-api A-io