remove run on renku instructions as not working ATM

Author: RichardJActon

README.md

@@ -51,8 +51,3 @@ For instructions on how to prepare data for use in this app see the vignette:
 vignette("Generating-input", package = "MutantSets")
 ```
 
-## Run on Renku
-
-https://renkulab.io/projects/racton/mutantsets
-
-You can Run MutantSets without installing it on your local machine by going to it's page on Renkulab.io and hitting start, it will take a minute to get spun up but should work just fine after that. Click open to view in full screen.