remove insert in readMe

Author: MartynasStrazdas

packages/itwin/tree-widget/README.md

@@ -334,9 +334,6 @@ Use `getSubTreePaths` when you need to restrict the visible hierarchy to a speci
 
 **Restrict the hierarchy to a sub-tree and keep the default filtering logic**: You already have a list of `InstanceKey` items that should remain in the tree. Pass them as `targetItems` to `createInstanceKeyPaths`. This will restrict the hierarchy to a sub-tree, but filtering will work as before.
 
-  <!-- [[include: [TreeWidget.GetSubTreePathsComponentWithTargetItemsExample], tsx]] -->
-  <!-- BEGIN EXTRACTION -->
-
 ```tsx
 type UseModelsTreeProps = Props<typeof useModelsTree>;
 type GetSubTreePathsType = NonNullable<UseModelsTreeProps["getSubTreePaths"]>;
@@ -376,8 +373,6 @@ function CustomModelsTreeComponentWithTargetItems({
 }
 ```
 
-  <!-- END EXTRACTION -->
-
 ### Categories tree
 
 The component, based on the active view, renders a hierarchy of either spatial (3d) or drawing (2d) categories. The hierarchy consists of two levels - the category (spatial or drawing) and its sub-categories. There's also a header that renders categories search box and various visibility control buttons.