Remove an incompatible java api method in java 8 from a test

Author: jchyb

tests/pos/i19354.orig.scala

@@ -10,7 +10,6 @@ class P extends AbstractProcessor {
  .flatMap(annotation => roundEnv.getElementsAnnotatedWith(annotation).stream())
  .filter(element => element.getKind == ElementKind.PACKAGE)
  .map(element => element.asInstanceOf[PackageElement])
- .toList()
  true
  }
 }