Remove reference to archived project in docs.
The buildbarn project at was archived over a year ago, as discussed in so it's not a good example reference anymore.
Closes
@@ -106,10 +106,6 @@ events to using the `--bes_backend=HOST:PORT` flag. If your backend uses gRPC,
you must prefix the address with the appropriate scheme: `grpc://` for plaintext
gRPC and `grpcs://` for gRPC with TLS enabled.
-There is currently an experimental open source implementation of the [Build
-Event Service](https://github.com/buildbarn/bb-event-service/) in Go as part of
-the Buildbarn suite of Remote Execution tools and services.
-
### Build Event Service flags
Bazel has several flags related to the Build Event Service protocol, including:
