tracing: remove uncommonly-used tuning configs

[brianwolfe]

These configurations were added to be consistent with Stackdriver and
provide extra performance tuning for OpenCensus. These are unlikely to
be used in production. Tuning should probably be performed by Istio
developers instead. We can remove the options for now.

This was triggered by a conversation at the end of the previous CL
merge. See: #1563

Change-Id: Iab148ff87dfe5b1772d3cdf2a009ec9cf4ea0f27
Reviewed-on: https://gerrit.musta.ch/c/public/istio-api/+/596
Reviewed-by: Jungho Ahn jungho.ahn@airbnb.com
Reviewed-by: Ying Zhu ying.zhu@airbnb.com

[istio-testing]

Hi @brianwolfe. Thanks for your PR.

I'm waiting for a istio member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[brianwolfe]

@nrjpoddar @mandarjog PTAL. This is followup from the previous change: #1563

[brianwolfe]

@nrjpoddar ping

[mandarjog]

Lgtm
Makes sense, we can add them if needed.

[brianwolfe]

@howardjohn can you ok-to-test this? I still don't have perms to do that.

[smawson]

/ok-to-test