The following revision refers to this bug:
  https://chromium.googlesource.com/infra/luci/luci-go.git/+/d42a0a181efc55fe3244e199a354ad6df9aaf346

commit d42a0a181efc55fe3244e199a354ad6df9aaf346
Author: Nodir Turakulov <nodir@google.com>
Date: Mon Aug 06 22:39:24 2018

[eventlog] Delete eventlog.

It is unused.

Bug:  800631 
Change-Id: I6ca1a5270b774d043a3edc55be76b71a556634ef
Reviewed-on: https://chromium-review.googlesource.com/1164401
Reviewed-by: Katie Thomas <katthomas@google.com>
Commit-Queue: Nodir Turakulov <nodir@chromium.org>

[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/eventlog.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/eventlog_test.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/internal/logservice/batch_logger.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/internal/logservice/batch_logger_test.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/internal/logservice/logservice.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/proto/chrome_infra_log.pb.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/proto/goma_stats.pb.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/proto/log_request_lite.pb.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/common/eventlog/settings.go
[delete] https://crrev.com/bcc71a2a52f3450e930d9edca6886fc0bc199096/examples/eventlog/main.go