Remove comment to verify user existence check.

Role is a higher level component so it shouldn't know or provide
service to partial, dying or pre-created users.

Fixes: 178243532
Test: presubmit
Change-Id: Ie7a8aef173f6f81ccc7c21a00faa901f89c47a3b
diff --git a/service/java/com/android/role/RoleService.java b/service/java/com/android/role/RoleService.java
index 5f7eb22..3cbd9a8 100644
--- a/service/java/com/android/role/RoleService.java
+++ b/service/java/com/android/role/RoleService.java
@@ -552,8 +552,6 @@
         }
 
         private boolean isUserExistent(@UserIdInt int userId) {
-            // FIXME: This checks whether the user is alive, but we should check for whether the
-            //  user is existent.
             return mUserManager.getUserHandles(true).contains(UserHandle.of(userId));
         }