doc: remove ETW from diag tierlist

PR-URL: #43295
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Gerhard Stöbich <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Rafael Gonzaga <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: tony-go

doc/contributing/diagnostic-tooling-support-tiers.md

@@ -137,7 +137,6 @@ The tools are currently assigned to Tiers as follows:
 | Tracing   | trace\_gc                 | No                            | Yes                     | 1           |
 | Tracing   | DTrace                    | No                            | Partial                 | 3           |
 | Tracing   | LTTng                     | No                            | Removed?                | N/A         |
-| Tracing   | ETW                       | No                            | Partial                 | 3           |
 | Tracing   | Systemtap                 | No                            | Partial                 | ?           |
 | Profiling | DTrace                    | No                            | Partial                 | 3           |
 | Profiling | Windows Xperf             | No                            | ?                       | ?           |