Use direct parent reference instead of importing it

Fixes the cyclic reference error observed when compiling files
using
sc annotations_1.scala Query_1.scala ScalaqlSyntax_1.scala package.scala_1.scala

Author: odersky

tests/pos/i23496/annotations_1.scala

@@ -1,5 +1,3 @@
 package scalaql
 
-import scala.annotation.StaticAnnotation
-
-class forbiddenInheritance extends StaticAnnotation
+class forbiddenInheritance extends scala.annotation.StaticAnnotation