remove Blue-cloud logo, not persistant link available

README.md

@@ -24,8 +24,6 @@ The following projects have contributed to strenghten ``zen4R``:
 
 * **Blue-Cloud** _Blue-Cloud has received funding from the European Union's Horizon programme call BG-07-2019-2020, topic: [A] 2019 - Blue Cloud services, Grant Agreement No.862409._ 
 
-<a href="https://blue-cloud.org/"><img height=100 width=300 src="https://hackathon.blue-cloud.org/wp-content/uploads/2021/11/Blue-cloud_extended_color.png"/></a>
-
 * **G2OI** project, cofinanced by the European Union, the Reunion region, and the French Republic.
 <div align="center">
 <img src="https://github.com/IRDG2OI/geoflow-g2oi/blob/main/img/logos_partenaires.png?raw=True" height="80px">