docs(aio): remove links to outdated live examples from the API documenation (#23966)

Closes #21525

PR Close #23966

packages/core/src/di/forward_ref.ts

@@ -44,7 +44,7 @@ export function forwardRef(forwardRefFn: ForwardRefFn): Type<any> {
  *
  * Acts as the identity function when given a non-forward-ref value.
  *
- * ### Example ([live demo](http://plnkr.co/edit/GU72mJrk1fiodChcmiDR?p=preview))
+ * ### Example
  *
  * {@example core/di/ts/forward_ref/forward_ref_spec.ts region='resolve_forward_ref'}
  *

packages/core/src/di/reflective_errors.ts

@@ -70,7 +70,7 @@ function addKey(this: InjectionError, injector: ReflectiveInjector, key: Reflect
  * Thrown when trying to retrieve a dependency by key from {@link Injector}, but the
  * {@link Injector} does not have a {@link Provider} for the given key.
  *
- * ### Example ([live demo](http://plnkr.co/edit/vq8D3FRB9aGbnWJqtEPE?p=preview))
+ * ### Example
  *
  * ```typescript
  * class A {
@@ -90,7 +90,7 @@ export function noProviderError(injector: ReflectiveInjector, key: ReflectiveKey
 /**
  * Thrown when dependencies form a cycle.
  *
- * ### Example ([live demo](http://plnkr.co/edit/wYQdNos0Tzql3ei1EV9j?p=info))
+ * ### Example
  *
  * ```typescript
  * var injector = Injector.resolveAndCreate([
@@ -116,7 +116,7 @@ export function cyclicDependencyError(
  * The `InstantiationError` class contains the original error plus the dependency graph which caused
  * this object to be instantiated.
  *
- * ### Example ([live demo](http://plnkr.co/edit/7aWYdcqTQsP0eNqEdUAf?p=preview))
+ * ### Example
  *
  * ```typescript
  * class A {
@@ -149,7 +149,7 @@ export function instantiationError(
  * Thrown when an object other then {@link Provider} (or `Type`) is passed to {@link Injector}
  * creation.
  *
- * ### Example ([live demo](http://plnkr.co/edit/YatCFbPAMCL0JSSQ4mvH?p=preview))
+ * ### Example
  *
  * ```typescript
  * expect(() => Injector.resolveAndCreate(["not a type"])).toThrowError();
@@ -166,7 +166,7 @@ export function invalidProviderError(provider: any) {
  * Lack of annotation information prevents the {@link Injector} from determining which dependencies
  * need to be injected into the constructor.
  *
- * ### Example ([live demo](http://plnkr.co/edit/rHnZtlNS7vJOPQ6pcVkm?p=preview))
+ * ### Example
  *
  * ```typescript
  * class A {
@@ -209,7 +209,7 @@ export function noAnnotationError(typeOrFunc: Type<any>| Function, params: any[]
 /**
  * Thrown when getting an object by index.
  *
- * ### Example ([live demo](http://plnkr.co/edit/bRs0SX2OTQiJzqvjgl8P?p=preview))
+ * ### Example
  *
  * ```typescript
  * class A {}

packages/core/src/di/reflective_injector.ts

@@ -26,7 +26,7 @@ const UNDEFINED = new Object();
  * In typical use, application code asks for the dependencies in the constructor and they are
  * resolved by the `Injector`.
  *
- * ### Example ([live demo](http://plnkr.co/edit/jzjec0?p=preview))
+ * ### Example
  *
  * The following example creates an `Injector` configured to create `Engine` and `Car`.
  *
@@ -58,7 +58,7 @@ export abstract class ReflectiveInjector implements Injector {
    * A resolution is a process of flattening multiple nested arrays and converting individual
    * providers into an array of {@link ResolvedReflectiveProvider}s.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/AiXTHi?p=preview))
+   * ### Example
    *
    * ```typescript
    * @Injectable()
@@ -95,7 +95,7 @@ export abstract class ReflectiveInjector implements Injector {
    * The passed-in providers can be an array of `Type`, {@link Provider},
    * or a recursive array of more providers.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/ePOccA?p=preview))
+   * ### Example
    *
    * ```typescript
    * @Injectable()
@@ -126,7 +126,7 @@ export abstract class ReflectiveInjector implements Injector {
    *
    * This API is the recommended way to construct injectors in performance-sensitive parts.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/KrSMci?p=preview))
+   * ### Example
    *
    * ```typescript
    * @Injectable()
@@ -156,7 +156,7 @@ export abstract class ReflectiveInjector implements Injector {
    * <!-- TODO: Add a link to the section of the user guide talking about hierarchical injection.
    * -->
    *
-   * ### Example ([live demo](http://plnkr.co/edit/eosMGo?p=preview))
+   * ### Example
    *
    * ```typescript
    * var parent = ReflectiveInjector.resolveAndCreate([]);
@@ -175,7 +175,7 @@ export abstract class ReflectiveInjector implements Injector {
    * The passed-in providers can be an array of `Type`, {@link Provider},
    * or a recursive array of more providers.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/opB3T4?p=preview))
+   * ### Example
    *
    * ```typescript
    * class ParentProvider {}
@@ -204,7 +204,7 @@ export abstract class ReflectiveInjector implements Injector {
    *
    * This API is the recommended way to construct injectors in performance-sensitive parts.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/VhyfjN?p=preview))
+   * ### Example
    *
    * ```typescript
    * class ParentProvider {}
@@ -228,7 +228,7 @@ export abstract class ReflectiveInjector implements Injector {
    *
    * The created object does not get cached by the injector.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/yvVXoB?p=preview))
+   * ### Example
    *
    * ```typescript
    * @Injectable()
@@ -254,7 +254,7 @@ export abstract class ReflectiveInjector implements Injector {
    *
    * The created object does not get cached by the injector.
    *
-   * ### Example ([live demo](http://plnkr.co/edit/ptCImQ?p=preview))
+   * ### Example
    *
    * ```typescript
    * @Injectable()

packages/core/src/di/reflective_provider.ts

@@ -42,7 +42,7 @@ const _EMPTY_LIST: any[] = [];
  *
  * It can be created manually, as follows:
  *
- * ### Example ([live demo](http://plnkr.co/edit/RfEnhh8kUEI0G3qsnIeT?p%3Dpreview&p=preview))
+ * ### Example
  *
  * ```typescript
  * var resolvedProviders = Injector.resolve([{ provide: 'message', useValue: 'Hello' }]);