docs: remove redundant license from README

This fixes displaying license on revive.run.

Author: alexandear

README.md

@@ -76,7 +76,6 @@ If you disable them in the config file, revive will run over 6x faster than goli
   - [Contributors](#contributors)
     - [Maintainers](#maintainers)
     - [All](#all)
-  - [License](#license)
 
 <!-- /TOC -->
 
@@ -844,7 +843,3 @@ This project exists thanks to all the people who contribute.
 <a href="https://github.com/mgechev/revive/graphs/contributors">
   <img alt="All Contributors" src="https://contrib.rocks/image?repo=mgechev/revive&max=500" />
 </a>
-
-## License
-
-MIT