Extract searchForPropertyInActual to base

Author: ssh24

lib/migration.js

@@ -131,18 +131,6 @@ function mixinMigration(PostgreSQL) {
     return sql;
   };
 
-  PostgreSQL.prototype.searchForPropertyInActual = function(model, propName, actualFields) {
-    var self = this;
-    var found = false;
-    actualFields.forEach(function(f) {
-      if (f.column === self.column(model, propName)) {
-        found = f;
-        return;
-      }
-    });
-    return found;
-  };
-
   PostgreSQL.prototype.getPropertiesToModify = function(model, actualFields) {
     var self = this;
     var sql = [];