fix(of): remove deprecation comment to prevent false positive warning (#4724)

Author: evertbouw

src/internal/observable/of.ts

@@ -26,7 +26,6 @@ export function of<T, T2, T3, T4, T5, T6, T7, T8>(a: T, b: T2, c: T3, d: T4, e:
 /** @deprecated use {@link scheduled} instead `scheduled([a, b, c], scheduler)` */
 exportfunctionof<T,T2,T3,T4,T5,T6,T7,T8,T9>(a: T,b: T2,c: T3,d: T4,e: T5,f: T6,g: T7,h: T8,i: T9,scheduler: SchedulerLike):
 Observable<T|T2|T3|T4|T5|T6|T7|T8|T9>;
-/** @deprecated use {@link scheduled} instead `scheduled([a, b, c], scheduler)` */
 exportfunctionof<T>(...args: (T|SchedulerLike)[]): Observable<T>;
 
 // TODO(benlesh): Update the typings for this when we can switch to TS 3.x