Remove error tag from positive test

abeln · abeln · commit e9978c03c791 · 2018-10-23T11:39:53.000-04:00
It looks like it's copypasta from when the test was added.
diff --git a/tests/pos/i1747.scala b/tests/pos/i1747.scala
@@ -1,3 +1,3 @@
 abstract class Coll[E] extends java.util.Collection[E] {
-  override def toArray[T](a: Array[T with Object]): Array[T with Object] = ??? // error: cannot override
+  override def toArray[T](a: Array[T with Object]): Array[T with Object] = ???
 }

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,3 @@`
`1`	`1`	`abstract class Coll[E] extends java.util.Collection[E] {`
`2`		`- override def toArray[T](a: Array[T with Object]): Array[T with Object] = ??? // error: cannot override`
	`2`	`+ override def toArray[T](a: Array[T with Object]): Array[T with Object] = ???`
`3`	`3`	`}`