GUACAMOLE-422: Revert weird addition of timezone field in JDBC module.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/user/ModeledUser.java

@@ -113,8 +113,7 @@ public class ModeledUser extends ModeledPermissions<UserModel> implements User {
         new TextField(User.Attribute.FULL_NAME),
         new EmailField(User.Attribute.EMAIL_ADDRESS),
         new TextField(User.Attribute.ORGANIZATION),
-        new TextField(User.Attribute.ORGANIZATIONAL_ROLE),
-        new TimeZoneField(TIMEZONE_ATTRIBUTE_NAME)
+        new TextField(User.Attribute.ORGANIZATIONAL_ROLE)
     ));
 
     /**
@@ -350,9 +349,6 @@ public class ModeledUser extends ModeledPermissions<UserModel> implements User {
         // Set role attribute
         attributes.put(User.Attribute.ORGANIZATIONAL_ROLE, getModel().getOrganizationalRole());
 
-        // Set timezone attribute
-        attributes.put(TIMEZONE_ATTRIBUTE_NAME, getModel().getTimeZone());
-
     }
 
     /**