doc: remove redundancy

Author: hynek

README.md

@@ -9,7 +9,6 @@
 
 <p align="center">
    <a href="https://www.attrs.org/en/stable/"><img src="https://img.shields.io/badge/Docs-RTD-black" alt="Documentation" /></a>
-   <a href="https://github.com/python-attrs/attrs/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-MIT-C06524" alt="License: MIT" /></a>
    <a href="https://bestpractices.coreinfrastructure.org/projects/6482"><img src="https://bestpractices.coreinfrastructure.org/projects/6482/badge"></a>
    <a href="https://pypi.org/project/attrs/"><img src="https://img.shields.io/pypi/v/attrs" /></a>
    <a href="https://pepy.tech/project/attrs"><img src="https://static.pepy.tech/personalized-badge/attrs?period=month&units=international_system&left_color=grey&right_color=blue&left_text=Downloads%20/%20Month" alt="Downloads per month" /></a>