refactor(splitter): move all logic to splitter with start/end slots

Author: MonikaKirkova

src/components/common/definitions/defineAllComponents.ts

@@ -57,8 +57,6 @@ import IgcSliderComponent from '../../slider/slider.js';
 import IgcSliderLabelComponent from '../../slider/slider-label.js';
 import IgcSnackbarComponent from '../../snackbar/snackbar.js';
 import IgcSplitterComponent from '../../splitter/splitter.js';
-import IgcSplitterBarComponent from '../../splitter/splitter-bar.js';
-import IgcSplitterPaneComponent from '../../splitter/splitter-pane.js';
 import IgcStepComponent from '../../stepper/step.js';
 import IgcStepperComponent from '../../stepper/stepper.js';
 import IgcTabComponent from '../../tabs/tab.js';
@@ -137,9 +135,7 @@ const allComponents: IgniteComponent[] = [
   IgcCircularGradientComponent,
   IgcSnackbarComponent,
   IgcDateTimeInputComponent,
-  IgcSplitterBarComponent,
   IgcSplitterComponent,
-  IgcSplitterPaneComponent,
   IgcStepperComponent,
   IgcStepComponent,
   IgcTextareaComponent,