Remove failing repl test

We keep the test as a neg test anyway. The old and new error messages are both uninteresting.

Author: odersky

compiler/test-resources/repl/i2492

@@ -0,0 +1,4 @@
+class Map[K, V]
+object Foo {
+ val s: Map {type Map$K = String; type Map$V = Int} = null // error
+}