chore(elements): updating import path for elements

Author: kdinev

projects/igniteui-angular-elements/src/analyzer/config.template.ts

@@ -4,7 +4,7 @@ import {
     IgxPivotDataSelectorComponent,
     IgxPivotGridComponent,
     IgxTreeGridComponent
-} from '../../../igniteui-angular/src/public_api';
+} from 'igniteui-angular/grids';
 
 export const registerComponents = [
     IgxGridComponent,

projects/igniteui-angular/tree/src/tree/tree.spec.ts

@@ -11,7 +11,6 @@ import { IgxTreeNodeComponent } from './tree-node/tree-node.component';
 import { IgxTreeSelectionService } from './tree-selection.service';
 import { IgxTreeComponent } from './tree.component';
 import { IgxTreeService } from './tree.service';
-import { PlatformUtil } from 'igniteui-angular/core';
 
 const TREE_ROOT_CLASS = 'igx-tree__root';
 const NODE_TAG = 'igx-tree-node';