docs: removed cdn v2 note since its default now (#1569)

Author: vishalnarkhede

docusaurus/docs/reactnative/basics/upgrade_helper.mdx

@@ -250,13 +250,6 @@ resized version of images (depending on DP ratio of device) will be requested fr
 Also previously all the image attachments used to be rendered in fixed size container, which was not ideal for portrait or landscape images since
 user won't be able to see a cropped image on UI. In this version, we render images in dynamic size container, depending on aspect ratio of image.
 
-:::note
-
-Resizing support on Stream's CDN (mentioned above) has not been released yet. But once available, you will be able to enable it for your organization
-without any changes to your code or SDK version.
-
-:::
-
 <Tabs
   defaultValue='case1'
   values={[