Remove the image override for maven tasks

The code was modified to use JDK 8, so the pipeline no longer needs this
override (and, in fact, shouldn't have it at all).
2 jobs for !1 with remove-jdk11-override in 9 minutes and 38 seconds (queued for 1 second)
detached
Status Name Job ID Coverage
  Review
passed trigger-trusted-tests #17686
osdu-small

00:09:38

failed trigger-trusted-tests #17685
osdu-small

00:00:09