Revert "Release/v2.2.0"

Author: stex2005

README.md

@@ -4,7 +4,6 @@
 ![Static Badge](https://img.shields.io/badge/ROS2-Available-green)
 ![Static Badge](https://img.shields.io/badge/License-Apache%202.0-blue)
 ![Python](https://img.shields.io/badge/python-3.10%2B-blue)
-![pip](https://img.shields.io/badge/pip-23.0%2B-blue)
 ![Dev Container](https://img.shields.io/badge/Dev-Container%20Ready-blue)
 ![GitHub Repo stars](https://img.shields.io/github/stars/robotmcp/ros-mcp-server?style=social)
 ![GitHub last commit](https://img.shields.io/github/last-commit/robotmcp/ros-mcp-server)