docs: remove all deprecated @stable jsdoc tags (#23210)

These are no longer needed as stable docs are computed as those that
do not have `@experimental` or `@deprecated` tags.

PR Close #23210

packages/common/http/src/client.ts

@@ -43,7 +43,7 @@ function addBody<T>(
 }
 
 /**
- * @stable
+ *
  */
 export type HttpObserve = 'body' | 'events' | 'response';
 
@@ -54,7 +54,7 @@ export type HttpObserve = 'body' | 'events' | 'response';
  * Each request method has multiple signatures, and the return type varies according to which
  * signature is called (mainly the values of `observe` and `responseType`).
  *
- * @stable
+ *
  */
 @Injectable()
 export class HttpClient {