Revert "Add workaround for a QoS-related bug in VMWare Workstation."

This reverts commit 77c2fe20df6a9a7c1a353e1a4ab2ba80fefab881.

The VMware Workstation issue was fixed in 2019[1], and we'd rather not
carry unnecessary local changes in OpenSSH.

[1] https://communities.vmware.com/t5/VMware-Workstation-Pro/Regression-ssh-results-in-broken-pipe-upon-connecting-in-Vmware/m-p/486105/highlight/true#M25470

PR: 234426
Discussed with: yuripv
Approved by: des
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation

(cherry picked from commit d55bf492f8f587e4a99f4dcb39a96159b4431782)
(cherry picked from commit 6fd4891545c2a6d06dbc1927b2e0b375cd2b0b17)