ProjectControl: remove "isHidden" when checking "READ" permission

Change-Id: I687f2957135bfba3c3a66617828980ddc5b14c85

java/com/google/gerrit/server/permissions/ProjectControl.java

@@ -404,7 +404,7 @@ class ProjectControl {
               || isOwner();
 
         case READ:
-          return !isHidden() && allRefsAreVisible(Collections.emptySet());
+          return allRefsAreVisible(Collections.emptySet());
 
         case CREATE_REF:
           return canAddRefs();