fix addiing duplicate PK attributes in select query

lib/dialects/abstract/query-generator.js

@@ -544,10 +544,7 @@ module.exports = (function() {
             })
             })
         } else {
         } else {
             mainAttributes.push("id")
             mainAttributes.push("id")
-        }
-        
-        //mainAttributes = mainAttributes.concat(factory.hasPrimaryKeys ? factory.primaryKeyAttributes : ['id'])
-          
+        }          
       }
       }
 
 
       // Escape attributes
       // Escape attributes