clear doc

Author: Mantisus

docs/04_upgrading/upgrading_to_v2.md

@@ -11,8 +11,7 @@ This page summarizes the breaking changes between Apify Python API client v1.x a
 
 ## Change underlying HTTP library
 
-In v2.0, the Apify Python API client switched from using `httpx` to [`impit`](https://github.com/apify/impit) as the underlying HTTP library. This
-change was made to improve performance and reduce the bundle size.
+In v2.0, the Apify Python API client switched from using `httpx` to [`impit`](https://github.com/apify/impit) as the underlying HTTP library.
 
 ## Update signature of methods