Don't ask to download CMake on Windows.

The one from Visual Studio works just fine now.

Author: john-preston

docs/building-win.md

@@ -21,7 +21,6 @@ You will require **api_id** and **api_hash** to access the Telegram API servers.
 ## Install third party software
 
 * Download **Python 3.10** installer from [https://www.python.org/downloads/](https://www.python.org/downloads/) and install it with adding to PATH.
-* Download **CMake 3.21 or later** installer from [https://cmake.org/download/](https://cmake.org/download/) and install it.
 * Download **Git** installer from [https://git-scm.com/download/win](https://git-scm.com/download/win) and install it.
 
 ## Clone source code and prepare libraries