[release-1.6] stackdriver was removed over a year ago (#5352)

* stackdriver was removed over a year ago

* drop extra comma

Co-authored-by: dprotaso <dprotaso@gmail.com>
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Knative Prow Robot 2022-12-07 15:12:14 +00:00 committed by GitHub
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@ -46,15 +46,11 @@ data:
You can configure your `config-tracing` with following options: You can configure your `config-tracing` with following options:
* `backend`: Valid values are `zipkin`, `stackdriver`, or `none`. The default is `none`. * `backend`: Valid values are `zipkin` or `none`. The default is `none`.
* `zipkin-endpoint`: Specifies the URL to the zipkin collector where you want to send the traces. * `zipkin-endpoint`: Specifies the URL to the zipkin collector where you want to send the traces.
Must be set if backend is set to `zipkin`. Must be set if backend is set to `zipkin`.
* `stackdriver-project-id`: Specifies the GCP project ID into which the Stackdriver traces are written.
You must specify the `backend` as `stackdriver`. If `backend`is unspecified, the GCP project ID is read
from GCP metadata when running on GCP.
* `sample-rate`: Specifies the sampling rate. Valid values are decimals from `0` to `1` * `sample-rate`: Specifies the sampling rate. Valid values are decimals from `0` to `1`
(interpreted as a float64), which indicate the probability that any given request is sampled. (interpreted as a float64), which indicate the probability that any given request is sampled.
An example value is `0.5`, which gives each request a 50% sampling probablity. An example value is `0.5`, which gives each request a 50% sampling probablity.