You can delete the tags of a stack in the Resource Orchestration Service (ROS) console if they are no longer needed.
Procedure
Log on to the ROS console.
In the left-side navigation pane, click Stacks.
In the top navigation bar, select the region of the stack that you want to manage from the region drop-down list. In this example, China (Hangzhou) is selected.
On the Stacks page, find the stack and click the stack ID in the Stack Name column.
On the Stack Information tab, click Edit on the right of Tag.
In the Edit tag dialog box, click the icon on the right of the tag that you want to delete.
Click Confirm.