The GitHub Application credentials (client id & secret) that were previously
visible in the file

scripts/create-travis-configuration.sh

are not valid. These were erroneously committed for testing purposes and never
provided access to anything.

(checked in commit f28cf09fc29d322a77a098a5008e4898c88febc1,
deleted in commit cead12a07cbacb329a484e7f7ecc1084927575c3)


