README: downloading rascal.jar no longer necessary

README.md

@@ -6,10 +6,6 @@ Rascal implementation of a simple rule checker for student Java assignments.
 
 ## Running the rule checker
 
-1. Download the latest rascal-shell-unstable.jar from the rascal website and
-   put it next to the run.sh script
-   http://update.rascal-mpl.org/console/rascal-shell-unstable.jar
-
 1. Run the script
 
         $ ./run.sh <ruleset-name> <absolute-path-to-student-project>