Remove platforms badge from README

Removed platforms badge from README.

Author: mosi-sol

README.md

@@ -4,7 +4,6 @@
   <img src="https://img.shields.io/badge/C%2B%2B-17-blue.svg" alt="C++17">
   <img src="https://img.shields.io/badge/Version-2.0.0-green.svg" alt="Version">
   <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="License">
-  <img src="https://img.shields.io/badge/Platforms-Linux%20%7C%20macOS%20%7C-Windows-lightgrey.svg" alt="Platforms">
 </p>
 
 <p align="center">