update readme badges

Author: dionisiydk

README.md

@@ -3,11 +3,7 @@
 [![GitHub release](https://img.shields.io/github/release/pharo-ide/Seamless.svg)](https://github.com/pharo-ide/Seamless/releases/latest)
 [![Unit Tests](https://github.com/pharo-ide/Seamless/actions/workflows/tests.yml/badge.svg)](https://github.com/pharo-ide/Seamless/actions/workflows/tests.yml)
 
-[![Pharo 7.0](https://img.shields.io/badge/Pharo-7.0-informational)](https://pharo.org)
-[![Pharo 8.0](https://img.shields.io/badge/Pharo-8.0-informational)](https://pharo.org)
-[![Pharo 9.0](https://img.shields.io/badge/Pharo-9.0-informational)](https://pharo.org)
 [![Pharo 10](https://img.shields.io/badge/Pharo-10-informational)](https://pharo.org)
-[![Pharo 11](https://img.shields.io/badge/Pharo-11-informational)](https://pharo.org)
 
 For details on Seamless design read [full documentation](https://github.com/SquareBracketAssociates/Booklet-Infrastructure).