GH2201: Remove unused IsJoinable function from JoinWalker.

Author: David Ellingsworth

src/NHibernate/Loader/JoinWalker.cs

@@ -791,21 +791,6 @@ public override int GetHashCode()
 			}
 		}
 
-		/// <summary>
-		/// Should we join this association?
-		/// </summary>
-		protected bool IsJoinable(JoinType joinType, ISet<AssociationKey> visitedAssociationKeys, string lhsTable,
-			string[] lhsColumnNames, IAssociationType type, int depth)
-		{
-			if (joinType < JoinType.InnerJoin) return false;
-			if (joinType == JoinType.InnerJoin) return true;
-
-			int maxFetchDepth = Factory.Settings.MaximumFetchDepth;
-			bool tooDeep = maxFetchDepth >= 0 && depth >= maxFetchDepth;
-
-			return !tooDeep && !IsDuplicateAssociation(lhsTable, lhsColumnNames, type);
-		}
-
 		protected SqlString OrderBy(IList<OuterJoinableAssociation> associations, SqlString orderBy)
 		{
 			return MergeOrderings(OrderBy(associations), orderBy);