Reverting the memory leak patch for MySQL. Problems have been reported with the grid server after running for several hours

OpenSim/Data/MSSQL/MSSQLInventoryData.cs

@@ -348,6 +348,8 @@ namespace OpenSim.Data.MSSQL
                 //Delete the actual row
                 DeleteOneFolder(folderID, connection);
                 DeleteItemsInFolder(folderID, connection);
+
+                connection.Close();
             }
         }