remove faulty logic in update code

lib/dialects/mssql/query-generator.js

@@ -226,30 +226,28 @@ module.exports = (function() {
       var query;
       attrValueHash = Utils.removeNullValuesFromHash(attrValueHash, false, options);
 
-      //very unique case for cascades, i generally don't approve
-      if(Object.keys(attrValueHash).length === 1 && attributes[Object.keys(attrValueHash)[0]].primaryKey){
-        this.sequelize.log('Updating a Primary Key is not supported in MSSQL, please restructure your query');
-      }else{
-        for(var key in attributes){
-          var aliasKey = attributes[key].field || key;
-          if(attributes[key].primaryKey && attrValueHash[aliasKey]){
-            delete attrValueHash[aliasKey];
-          }
-          if(attrValueHash[aliasKey] && attrValueHash[aliasKey].fn){
-
-          }
+      for (var key in attributes) {
+        var aliasKey = attributes[key].field || key;
+        if (attributes[key].primaryKey && attrValueHash[aliasKey]) {
+          delete attrValueHash[aliasKey];
         }
-        if(!Object.keys(attrValueHash).length){
-          return '';
-          //return ['SELECT * FROM ', tableName, 'WHERE', this.getWhereConditions(where) + ';'].join(' ');
+
+        if (attrValueHash[aliasKey] && attrValueHash[aliasKey].fn) {
+
         }
-        query = [
-          SqlGenerator.updateSql(tableName, attrValueHash, attributes),
-          'WHERE',
-          this.getWhereConditions(where)
-        ].join(' ') + ';';
       }
 
+      if (!Object.keys(attrValueHash).length) {
+        return '';
+        //return ['SELECT * FROM ', tableName, 'WHERE', this.getWhereConditions(where) + ';'].join(' ');
+      }
+
+      query = [
+        SqlGenerator.updateSql(tableName, attrValueHash, attributes),
+        'WHERE',
+        this.getWhereConditions(where)
+      ].join(' ') + ';';
+
       return query;
     },