remove oauth credentials

src/main/webapp/config.properties.example

 security.arsnova-url=http://localhost:8080/arsnova-war
 security.cas-server-url=https://cas.thm.de/cas
 
-security.facebook.key=318531508227494
-security.facebook.secret=e3f38cfc72bb63e35641b637081a6177
-
-security.twitter.key=bmk6i12UPjxEUPwtxAuQ
-security.twitter.secret=k3E52IJIYEUoeTWAakGldoyFYAS0OIEtDj050UzBrFw
-
-security.google.key=564933073000.apps.googleusercontent.com
-security.google.secret=Cgr28WN7btc04BJRpzmWe9k6
-
-
 couchdb.host=localhost
 couchdb.port=5984
 couchdb.name=arsnova
\ No newline at end of file