Remove action_monthly_active_users_web_ide_edit metric

What does this MR do and why?

This MR removes the action_monthly_active_users_web_ide_edit metric as it is a duplicate. (Described in #388236 (closed)).

The relevant teams have already been informed and agreed upon the removal in #388236 (closed).

How to set up and validate locally

• Set-up: https://docs.gitlab.com/ee/development/service_ping/implement.html#set-up-and-test-service-ping-locally
• usage_activity_by_stage_monthly.create.action_monthly_active_users_web_ide_edit should no longer be part of a generated Service Ping

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.