tree 4b55e0188a096e6a5115732d5a42c4ef7f8786e9
parent 6c762c9e9cc4dcd8c54790950d80667bf9870504
author bnc <bnc@google.com> 1578680086 -0800
committer Copybara-Service <copybara-worker@google.com> 1578680121 -0800

Remove PRIORITY frame.

PRIORITY frame has been removed from the draft HTTP/3 spec at
https://github.com/quicwg/base-drafts/pull/2922.

Also remove protocol flag FLAGS_quic_allow_http3_priority.

gfe-relnote: n/a, change to QUIC v99-only code.  Protected by existing disabled gfe2_reloadable_flag_quic_enable_version_99.
PiperOrigin-RevId: 289115003
Change-Id: I52891171f4c2b11107f0afc2db6e069963b13d6e