chore: Removed unused import

Author: rkaraivanov

projects/igniteui-angular/slider/src/slider/slider.component.spec.ts

@@ -6,7 +6,6 @@ import { NoopAnimationsModule } from '@angular/platform-browser/animations';
 import { UIInteractions, wait } from '../../../test-utils/ui-interactions.spec';
 import { IgxSliderType, IgxThumbFromTemplateDirective, IgxThumbToTemplateDirective, IRangeSliderValue, TickLabelsOrientation, TicksOrientation } from './slider.common';
 import { IgxSliderComponent } from './slider.component';
-import { isLeftToRight } from 'igniteui-angular';
 
 const SLIDER_CLASS = '.igx-slider';
 const THUMB_TAG = 'igx-thumb';