CommentsIT#postCommentsUnreachableData: Remove unnecessary setApiUser call

Change-Id: Icfb41af5e35e3674a85e188918c972d623f41be1
diff --git a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
index 0a9f41c..fb2441b 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
@@ -291,8 +291,6 @@
 
   @Test
   public void postCommentsUnreachableData() throws Exception {
-    setApiUser(admin);
-
     String file = "file";
     PushOneCommit push =
         pushFactory.create(db, admin.getIdent(), testRepo, "first subject", file, "l1\nl2\n");