chore: update deprecations (#6259)

* chore: remove unused $$iterator symbol

* chore: update some renamed deprecations

* chore: update some internal deprecations

* chore: update scheduler deprecations

* chore: update the xWith-related deprecations

* chore: update empty and never deprecations

* chore: update config deprecations

* chore: update timeoutWith deprecations

* chore: update generate deprecations

* chore: update TimeInterval deprecation

* chore: update Observable and tap deprecations

* chore: update pluck deprecation

* chore: update partition deprecation

* chore: remove sampleTime deprecation

Neither auditTime nor throttleTime are deprecated, so...

* chore: update resultSelector deprecations

* chore: update mergeMapTo deprecation

* chore: add backticks

* chore: update scheduler parameter deprecations

* chore: update pairs deprecations

* chore: update scheduler parameter deprecations

* chore: update delayWhen deprecations

* chore: update timer deprecation

* chore: update api_guardian

* chore: update throwError deprecations

* chore: remove delayWhen dtslint deprecation test

* chore: use API type in defer docs

* chore: update Notification deprecations

* chore: remove materialize deprecation

* docs: add multicasting deprecations doc

* chore: add colon after details

* chore: update multicasting deprecations

* docs: use upcoming connectable API changes

* chore: use upcoming connectable API changes

* chore: update ajax deprecations

* chore: update websocked deprecation

* chore: update uninferrable type param deprecations

* chore: update fromEvent deprecations

* chore: update rest-params deprecations

api_guard/dist/types/operators/index.d.ts

@@ -57,7 +57,6 @@ export declare function defaultIfEmpty<T, R>(defaultValue: R): OperatorFunction<
 
 export declare function delay<T>(due: number | Date, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>;
 
-export declare function delayWhen<T>(delayDurationSelector: (value: T, index: number) => Observable<never>, subscriptionDelay?: Observable<any>): MonoTypeOperatorFunction<T>;
 export declare function delayWhen<T>(delayDurationSelector: (value: T, index: number) => Observable<any>, subscriptionDelay: Observable<any>): MonoTypeOperatorFunction<T>;
 export declare function delayWhen<T>(delayDurationSelector: (value: T, index: number) => Observable<any>): MonoTypeOperatorFunction<T>;