api: clarify that v2 is removed at EOY 2020 regardless. (#11083)
api: clarify that v2 is removed at EOY 2020 regardless. (#11083)

There was somewhat ambiguous wording after recent changes to the major versioning policy.

Signed-off-by: Harvey Tuch <htuch@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 311aee4cbe2b8779070f2f0729dfa6ae4f2dc80e

lyft/envoy-api,lyft/envoy-api,lyft/envoy-api