Remove service propagator from the definition of sql commenter

Author: XSAM

docs/database/database-spans.md

@@ -503,19 +503,7 @@ If the propagator does not provide any value, the instrumentation SHOULD NOT inj
   SELECT * FROM songs /*traceparent='00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01',tracestate='congo%3Dt61rcWkgMzE%2Crojo%3D00f067aa0ba902b7'*/
   ```
 
-### `service-name` propagator
-
-The `service-name` propagator is a propagator that can inject the `service.name` resource attribute into carrier.
-
-SDK contrib MAY provide this propagator for databases context propagation.
-
-The `service-name` propagator need to be manually configured by the user to know the `service.name` value if OpenTelemetry does not have a way to automatically fetch the `service.name` value.
-
-Note that the performance of certain database systems may be impacted by high cardinality values in comments. The `service-name` propagator is useful for these databases with minimal performance impact while providing useful context.
-
-**Examples with `service-name` propagator:**
-
-- For a query `SELECT * FROM songs` where `service.name` is `shoppingcart`:
+- For a query `SELECT * FROM songs` with a custom propagator that injects `service.name` into carrier where `service.name` is `shoppingcart`:
 
   ```sql
   SELECT * FROM songs /*service.name='shoppingcart'*/