remove core-h script and add website link instead

docs/running_jobs/job_accounting.md

 # Job accounting
 
-## Accounting script
+## Project website
 
-The script **vsc4CoreHours.py** on VSC4
-calculates the **elapsed core-hours per user** in your project and the
-**total amount of core-hours in your project**. 
-#### Usage of the script
-
-
-##### Examples:
-
-    vsc4CoreHours.py                     # total project time span
-    vsc4CoreHours.py -D 7                # last week
-    vsc4CoreHours.py -S 2019-04-23 -E 2019-05-26T00:00:01
-    vsc4CoreHours.py -E 2020-05-26       # project start until 2020-05-26
-    vsc4CoreHours.py -S 2019-04-23       # 2019-04-23 until today
+Go to our project service page [service.vsc.ac.at](https://service.vsc.ac.at/cluster-user/) and log in with your VSC cluster user. There, at the menu item 'view statistics' the various project resources and their use can be seen. The used up core-h are listed at 'cpu contingent'
 
 ## sacct