chore(drp, dp): remove unused imports

Author: ddaribo

projects/igniteui-angular/src/lib/date-picker/date-picker.component.ts

@@ -5,7 +5,6 @@ import {
     ChangeDetectorRef,
     Component,
     ContentChild,
-    ContentChildren,
     ElementRef,
     EventEmitter,
     HostBinding,
@@ -19,7 +18,6 @@ import {
     Optional,
     Output,
     PipeTransform,
-    QueryList,
     Renderer2,
     ViewChild,
     ViewContainerRef,
@@ -50,7 +48,7 @@ import { DatePickerResourceStringsEN, IDatePickerResourceStrings } from '../core
 import { IBaseCancelableBrowserEventArgs, isDate, PlatformUtil } from '../core/utils';
 import { IgxCalendarContainerComponent } from '../date-common/calendar-container/calendar-container.component';
 import { PickerBaseDirective } from '../date-common/picker-base.directive';
-import { IgxPickerActionsDirective, IgxPickerClearComponent } from '../date-common/public_api';
+import { IgxPickerActionsDirective } from '../date-common/public_api';
 import { PickerHeaderOrientation } from '../date-common/types';
 import { DateTimeUtil } from '../date-common/util/date-time.util';
 import { DatePart, DatePartDeltas, IgxDateTimeEditorDirective } from '../directives/date-time-editor/public_api';

projects/igniteui-angular/src/lib/date-range-picker/date-range-picker.component.ts

@@ -19,7 +19,7 @@ import { DateRangePickerResourceStringsEN, IDateRangePickerResourceStrings } fro
 import { IBaseCancelableBrowserEventArgs, isDate, parseDate, PlatformUtil } from '../core/utils';
 import { IgxCalendarContainerComponent } from '../date-common/calendar-container/calendar-container.component';
 import { PickerBaseDirective } from '../date-common/picker-base.directive';
-import { IgxPickerActionsDirective, IgxPickerClearComponent } from '../date-common/picker-icons.common';
+import { IgxPickerActionsDirective } from '../date-common/picker-icons.common';
 import { DateTimeUtil } from '../date-common/util/date-time.util';
 import { IgxOverlayOutletDirective } from '../directives/toggle/toggle.directive';
 import {