more clean up of code that is not needed

Author: kccarter76

SubSonic/Linq/Expressions/Structure/DbExpressionVisitor/DbExpressionVisitor.cs renamed to SubSonic/Linq/Expressions/Structure/DbExpressionVisitor.cs

@@ -9,7 +9,7 @@ namespace SubSonic.Linq.Expressions.Structure
 {
     using Infrastructure;
 
-    public abstract partial class DbExpressionVisitor
+    public abstract class DbExpressionVisitor
         : ExpressionVisitor
     {
         protected static readonly char[] splitters = new char[] { '\n', '\r' };
@@ -119,5 +119,10 @@ protected internal virtual DbExpression VisitExpression(DbExpression expression)
         {
             throw Error.NotImplemented();
         }
+
+        protected internal virtual Expression VisitWhere(DbWhereExpression where)
+        {
+            throw Error.NotImplemented();
+        }
     }
 }

SubSonic/Linq/Expressions/Structure/DbExpressionVisitor/DbExpressionVisitorWhere.cs

@@ -29,12 +29,12 @@ protected internal override Expression VisitWhere(DbWhereExpression where)
                 if (((DbExpressionType)where.NodeType) == DbExpressionType.Where && !IsPredicate(where.Expression))
                 {
                     Write(Fragments.LEFT_PARENTHESIS);
-                    base.VisitWhere(where);
+                    Visit(where.Expression);
                     Write($"{Fragments.RIGHT_PARENTHESIS} <> 0");
                 }
                 else
                 {
-                    base.VisitWhere(where);
+                    Visit(where.Expression);
                 }
 
                 if (((DbExpressionType)where.NodeType).In(DbExpressionType.Exists, DbExpressionType.NotExists))