Drop telemetry_perf_unittests to 0% experiment on chromeos-kevin-chrome.

This should free up a few resources while we wait for more DUT
capacity to be deployed.

Bug: 1141234
Change-Id: I2caa4c5f430d88458effca7842e39b1b46a520ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3057990
Commit-Queue: Ben Pastene <[email protected]>
Commit-Queue: Tao Wu <[email protected]>
Quick-Run: Ben Pastene <[email protected]>
Auto-Submit: Ben Pastene <[email protected]>
Reviewed-by: Tao Wu <[email protected]>
Cr-Commit-Position: refs/heads/master@{#905951}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index b156579..3b900f7 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -2733,7 +2733,8 @@
       },
       'chromeos-kevin-chrome': {
         # TODO(crbug.com/1182948): Remove the experiment.
-        'experiment_percentage': 100,
+        # TODO(b/188822176): Restore to 100% when we have additional capacity.
+        'experiment_percentage': 0,
       },
       'linux-bionic-rel': {
         'args': [