feat(splitter): Removed needless properties #6639

Author: Vasil Mihalkov

Diff for: projects/igniteui-angular/src/lib/splitter/splitter-bar/splitter-bar.component.ts

@@ -83,27 +83,6 @@ export class IgxSplitBarComponent {
         return this.siblings[0].hidden && !this.siblings[1].hidden;
     }
 
-    /**
-     * A field that holds the initial size of the main `IgxSplitterPaneComponent` in each couple of panes devided by a gripper.
-     * @private
-     * @memberof SplitterComponent
-     */
-    private initialPaneSize!: number;
-
-    /**
-     * A field that holds the initial size of the sibling `IgxSplitterPaneComponent` in each couple of panes devided by a gripper.
-     * @private
-     * @memberof SplitterComponent
-     */
-    private initialSiblingSize!: number;
-
-    /**
-     * The sibling `IgxSplitterPaneComponent` in each couple of panes devided by a gripper.
-     * @private
-     * @memberof SplitterComponent
-     */
-    private sibling!: IgxSplitterPaneComponent;
-
     /**
      * @hidden
      * @internal