The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/c21c571e8788a23a5b0748783ee6b99ead774b2c

commit c21c571e8788a23a5b0748783ee6b99ead774b2c
Author: Jeffrey Li <lijeffrey@chromium.org>
Date: Thu May 17 00:33:52 2018

[Findit] Flake Analyzer - Deprecate Old Flake Pipelines

New flake analyzer pipelines are in production release, set to default, and producing results.
Time to remove all legacy flake analyzer pipelines!

Bug:  786518 
Change-Id: I0687edfe0bc36b7d08cb7333f396921d481dcde1
Reviewed-on: https://chromium-review.googlesource.com/1063035
Commit-Queue: Jeffrey Li <lijeffrey@chromium.org>
Reviewed-by: Chan Li <chanli@chromium.org>
Reviewed-by: Shuotao Gao <stgao@chromium.org>

[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/save_last_attempted_swarming_task_id_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/process_flake_try_job_result_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/process_flake_try_job_result_pipeline_test.py
[modify] https://crrev.com/c21c571e8788a23a5b0748783ee6b99ead774b2c/appengine/findit/main.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/send_notification_for_flake_culprit_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/finish_build_analysis_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/initialize_flake_try_job_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/recursive_flake_try_job_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/schedule_flake_try_job_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/analyze_flake_for_build_number_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/recursive_flake_try_job_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/regression_range_analysis_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/update_flake_analysis_data_points_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/finish_build_analysis_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/update_flake_bug_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/determine_true_pass_rate_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/trigger_flake_swarming_task_service_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/handlers/flake/analyze_regression_range.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/update_flake_bug_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/next_build_number_pipeline.py
[modify] https://crrev.com/c21c571e8788a23a5b0748783ee6b99ead774b2c/appengine/findit/handlers/flake/check_flake.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/process_flake_swarming_task_result_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/next_build_number_pipeline_test.py
[modify] https://crrev.com/c21c571e8788a23a5b0748783ee6b99ead774b2c/appengine/findit/handlers/flake/test/check_flake_test.py
[modify] https://crrev.com/c21c571e8788a23a5b0748783ee6b99ead774b2c/appengine/findit/templates/flake/result.html
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/regression_range_analysis_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/determine_true_pass_rate_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/save_last_attempted_swarming_task_id_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/analyze_flake_for_build_number_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/recursive_flake_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/initialize_flake_try_job_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/trigger_flake_swarming_task_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/recursive_flake_pipeline_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/update_flake_analysis_data_points_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/schedule_flake_try_job_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/handlers/flake/test/analyze_regression_range_test.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/send_notification_for_flake_culprit_pipeline.py
[delete] https://crrev.com/626d8187f96d3c576d30e15730ce5647a059a7ea/appengine/findit/waterfall/flake/test/trigger_flake_swarming_task_service_pipeline_test.py