chore: remove duplicate imports (#10692)

Author: rafaelss95

src/cdk/overlay/position/connected-position-strategy.spec.ts

@@ -1,18 +1,17 @@
-import {ElementRef, Component, NgModule, NgZone} from '@angular/core';
-import {TestBed, inject} from '@angular/core/testing';
-import {CdkScrollable} from '@angular/cdk/scrolling';
-import {Subscription} from 'rxjs';
-import {ScrollDispatchModule} from '@angular/cdk/scrolling';
-import {MockNgZone} from '@angular/cdk/testing';
 import {ComponentPortal, PortalModule} from '@angular/cdk/portal';
+import {CdkScrollable, ScrollDispatchModule} from '@angular/cdk/scrolling';
+import {MockNgZone} from '@angular/cdk/testing';
+import {Component, ElementRef, NgModule, NgZone} from '@angular/core';
+import {inject, TestBed} from '@angular/core/testing';
+import {Subscription} from 'rxjs';
 import {
-  OverlayModule,
-  Overlay,
-  OverlayRef,
-  OverlayContainer,
-  ConnectedPositionStrategy,
   ConnectedOverlayPositionChange,
+  ConnectedPositionStrategy,
   ConnectionPositionPair,
+  Overlay,
+  OverlayContainer,
+  OverlayModule,
+  OverlayRef,
 } from '../index';
 
 

src/cdk/overlay/position/connected-position-strategy.ts

@@ -6,23 +6,21 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {PositionStrategy} from './position-strategy';
-import {ElementRef} from '@angular/core';
-import {ViewportRuler} from '@angular/cdk/scrolling';
 import {Direction} from '@angular/cdk/bidi';
+import {CdkScrollable, ViewportRuler} from '@angular/cdk/scrolling';
+import {ElementRef} from '@angular/core';
+import {Observable} from 'rxjs';
+import {OverlayRef} from '../overlay-ref';
 import {
+  ConnectedOverlayPositionChange,
   ConnectionPositionPair,
   OriginConnectionPosition,
   OverlayConnectionPosition,
-  ConnectedOverlayPositionChange,
   validateHorizontalPosition,
   validateVerticalPosition,
 } from './connected-position';
-import {Observable} from 'rxjs';
-import {CdkScrollable} from '@angular/cdk/scrolling';
-import {OverlayRef} from '../overlay-ref';
 import {FlexibleConnectedPositionStrategy} from './flexible-connected-position-strategy';
-
+import {PositionStrategy} from './position-strategy';
 
 
 /**

src/cdk/overlay/position/flexible-connected-position-strategy.spec.ts

@@ -1,22 +1,22 @@
-import {ElementRef, NgModule, Component, NgZone} from '@angular/core';
-import {TestBed, inject} from '@angular/core/testing';
-import {CdkScrollable} from '@angular/cdk/scrolling';
-import {PortalModule, ComponentPortal} from '@angular/cdk/portal';
+import {ComponentPortal, PortalModule} from '@angular/cdk/portal';
+import {CdkScrollable, ScrollDispatchModule} from '@angular/cdk/scrolling';
+import {MockNgZone} from '@angular/cdk/testing';
+import {Component, ElementRef, NgModule, NgZone} from '@angular/core';
+import {inject, TestBed} from '@angular/core/testing';
 import {Subscription} from 'rxjs';
 import {map} from 'rxjs/operators';
-import {ScrollDispatchModule} from '@angular/cdk/scrolling';
-import {MockNgZone} from '@angular/cdk/testing';
 import {
-  OverlayModule,
+  ConnectedOverlayPositionChange,
+  FlexibleConnectedPositionStrategy,
   Overlay,
   OverlayConfig,
-  OverlayRef,
   OverlayContainer,
-  FlexibleConnectedPositionStrategy,
-  ConnectedOverlayPositionChange,
+  OverlayModule,
+  OverlayRef,
   ViewportRuler,
 } from '../index';
 
+
 // Default width and height of the overlay and origin panels throughout these tests.
 const DEFAULT_HEIGHT = 30;
 const DEFAULT_WIDTH = 60;

src/cdk/text-field/autofill.ts

@@ -17,8 +17,7 @@ import {
   OnInit,
   Output,
 } from '@angular/core';
-import {Observable, Subject} from 'rxjs';
-import {empty as observableEmpty} from 'rxjs';
+import {empty, Observable, Subject} from 'rxjs';
 
 
 /** An event that is emitted when the autofill state of an input changes. */
@@ -59,7 +58,7 @@ export class AutofillMonitor implements OnDestroy {
    */
   monitor(element: Element): Observable<AutofillEvent> {
     if (!this._platform.isBrowser) {
-      return observableEmpty();
+      return empty();
     }
 
     const info = this._monitoredElements.get(element);

src/demo-app/autocomplete/autocomplete-demo.ts

@@ -8,8 +8,8 @@
 
 import {Component, ViewChild, ViewEncapsulation} from '@angular/core';
 import {FormControl, NgModel} from '@angular/forms';
-import {startWith} from 'rxjs/operators';
-import {map} from 'rxjs/operators';
+import {map, startWith} from 'rxjs/operators';
+
 
 export interface State {
   code: string;

src/demo-app/datepicker/datepicker-demo.ts

@@ -8,10 +8,9 @@
 
 import {ChangeDetectionStrategy, Component, Host} from '@angular/core';
 import {FormControl} from '@angular/forms';
-import {MatDatepickerInputEvent} from '@angular/material/datepicker';
-import {DateAdapter} from '@angular/material/core';
-import {MatCalendar} from '@angular/material';
-import {ThemePalette} from '@angular/material/core';
+import {DateAdapter, ThemePalette} from '@angular/material/core';
+import {MatCalendar, MatDatepickerInputEvent} from '@angular/material/datepicker';
+
 
 @Component({
   moduleId: module.id,

src/demo-app/overlay/overlay-demo.ts

@@ -16,8 +16,7 @@ import {
   ViewContainerRef,
   ViewEncapsulation,
 } from '@angular/core';
-import {filter} from 'rxjs/operators';
-import {tap} from 'rxjs/operators';
+import {filter, tap} from 'rxjs/operators';
 
 
 @Component({

src/demo-app/table/table-demo.ts

@@ -6,16 +6,16 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {animate, state, style, transition, trigger} from '@angular/animations';
+import {SelectionModel} from '@angular/cdk/collections';
 import {Component, ElementRef, ViewChild} from '@angular/core';
+import {MatPaginator, MatSort, MatTableDataSource, PageEvent} from '@angular/material';
+import {fromEvent} from 'rxjs';
+import {debounceTime, distinctUntilChanged} from 'rxjs/operators';
 import {PeopleDatabase, UserData} from './people-database';
 import {PersonDataSource} from './person-data-source';
-import {MatPaginator, MatSort, MatTableDataSource, PageEvent} from '@angular/material';
 import {DetailRow, PersonDetailDataSource} from './person-detail-data-source';
-import {animate, state, style, transition, trigger} from '@angular/animations';
-import {SelectionModel} from '@angular/cdk/collections';
-import {distinctUntilChanged} from 'rxjs/operators';
-import {debounceTime} from 'rxjs/operators';
-import {fromEvent} from 'rxjs';
+
 
 export type UserProperties = 'userId' | 'userName' | 'progress' | 'color' | undefined;
 

src/demo-app/tree/dynamic-tree-demo/dynamic-database.ts

@@ -8,11 +8,10 @@
 import {Injectable} from '@angular/core';
 import {FlatTreeControl} from '@angular/cdk/tree';
 import {CollectionViewer, SelectionChange} from '@angular/cdk/collections';
-import {BehaviorSubject} from 'rxjs';
-import {Observable} from 'rxjs';
-import {merge} from 'rxjs';
+import {BehaviorSubject, merge, Observable} from 'rxjs';
 import {map} from 'rxjs/operators';
 
+
 /** Flat node with expandable and level information */
 export class DynamicFlatNode {
   isLoading: boolean = false;

src/demo-app/tree/tree-demo.ts

@@ -6,17 +6,16 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Component} from '@angular/core';
 import {FlatTreeControl, NestedTreeControl} from '@angular/cdk/tree';
+import {Component} from '@angular/core';
 import {
-  MatTreeFlattener,
   MatTreeFlatDataSource,
+  MatTreeFlattener,
   MatTreeNestedDataSource
 } from '@angular/material/tree';
-import {of as ofObservable} from 'rxjs';
-import {Observable} from 'rxjs';
+import {Observable, of as ofObservable} from 'rxjs';
+import {FileDatabase, FileFlatNode, FileNode} from './file-database';
 
-import {FileNode, FileFlatNode, FileDatabase} from './file-database';
 
 @Component({
   moduleId: module.id,