Merge pull request DataDog#10422 from DataDog/zach-groves-remove-DATADOG_PRIORITY_SAMPLING-setting

remove DATADOG_PRIORITY_SAMPLING setting

Author: cswatt

content/en/tracing/setup_overview/setup/python.md

@@ -137,7 +137,6 @@ It is recommended to use `DD_ENV`, `DD_SERVICE`, and `DD_VERSION` to set `env`,
 | `DD_AGENT_HOST` | `localhost` | Override the address of the trace Agent host that the default tracer attempts to submit traces to. |
 | `DATADOG_TRACE_AGENT_PORT` | `8126` | Override the port that the default tracer submit traces to. |
 | `DD_TRACE_AGENT_URL` | | The URL of the Trace Agent that the tracer submits to. Takes priority over hostname and port, if set. Supports Unix Domain Sockets in combination with the `apm_config.receiver_socket` in your `datadog.yaml` file, or the `DD_APM_RECEIVER_SOCKET` environment variable. |
-| `DATADOG_PRIORITY_SAMPLING` | `true` | Enable [Priority Sampling][7]. |
 | `DD_LOGS_INJECTION` | `false` | Enable [connecting logs and trace injection][8]. |
 
 ## Further Reading