feat(component): remove LetModule (#4087)

Closes #4077

BREAKING CHANGES:

The LetModule is removed in favor of the standalone LetDirective.

BEFORE:

import { LetModule } from '@ngrx/component';

@NgModule({
  imports: [
    // ... other imports
    LetModule,
  ],
})
export class MyFeatureModule {}

AFTER:

import { LetDirective } from '@ngrx/component';

@NgModule({
  imports: [
    // ... other imports
    LetDirective,
  ],
})
export class MyFeatureModule {}

modules/component/src/index.ts

@@ -1,4 +1,3 @@
 export { RenderScheduler } from './core/render-scheduler';
 export { LetDirective } from './let/let.directive';
-export { LetModule } from './let/let.module';
 export { PushPipe } from './push/push.pipe';

modules/component/src/let/let.directive.ts

@@ -34,7 +34,6 @@ export interface LetViewContext<PO> {
 }
 
 /**
- * @ngModule LetModule
  *
  * @description
  *

projects/ngrx.io/content/guide/component/let.md

@@ -23,14 +23,6 @@ import { LetDirective } from '@ngrx/component';
 export class MyStandaloneComponent {}
 ```
 
-<div class="alert is-critical">
-
-The `*ngrxLet` directive can be also used by importing the `LetModule`.
-However, the `LetModule` is deprecated in favor of the standalone `LetDirective`.
-See the [migration guide](guide/migration/v16#letmodule) for more information.
-
-</div>
-
 ## Comparison with `*ngIf` and `async`
 
 The current way of binding an observable to the view looks like this:

projects/ngrx.io/content/guide/migration/v15.md

@@ -114,7 +114,7 @@ The `MinimalActivatedRouteSnapshot` interface contains the required `title` prop
 
 #### Removal of ReactiveComponentModule
 
-The `ReactiveComponentModule` is removed in favor of [`LetModule`](/api/component/LetModule) and `PushModule`.
+The `ReactiveComponentModule` is removed in favor of `LetModule` and `PushModule`.
 
 BEFORE: