docs: fixed showing type in docs of Subscription (#5206)

* docs: fixed showing type in docs of Subscription

* refactor: remove unnecessary type information

In part just to kick off CI. But also, because it's more correctererer.

Co-authored-by: Ben Lesh <ben@benlesh.com>

src/internal/Subscription.ts

@@ -25,9 +25,8 @@ export class Subscription implements SubscriptionLike {
 
   /**
    * A flag to indicate whether this Subscription has already been unsubscribed.
-   * @type {boolean}
    */
-  public closed: boolean = false;
+  public closed = false;
 
   /** @internal */
   protected _parentOrParents: Subscription | Subscription[] | null = null;