Cleanup max_hours_before_termination GraphQL field outside of deprecation milestone
MR: Pending <!-- NOTE: For context on MR heading, see: https://handbook.gitlab.com/handbook/engineering/development/dev/create/remote-development/index.html#relationship-of-issues-to-mrs --> ## Description Spin-off from: gitlab-org/gitlab#509788+ Due to recent developments [preventing removal of fields](https://docs.google.com/document/d/19_7oipuumS785R6Hdsg8qLuB8qpq1lXNvGdTI1gTSYk/edit?tab=t.0) deprecated on the GraphQL layer and not marked as experimental on the breaking milestone (18.0 in this case), we need to still plan for the removal of these fields in a later milestone as they currently provide no benefit ( they are not used internally for anything) The fields in question: - `max_hours_before_termination` [on workspace type](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/graphql/types/remote_development/workspace_type.rb?ref_type=heads#L59) , [and mutation](https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/app/graphql/mutations/remote_development/workspace_operations/create.rb?ref_type=heads#L30) <!-- TODO: What kind of issue is this? Please uncomment and include one of the following: /label ~"type::feature" /label ~"type::bug" --> <!-- OPTIONAL: Is this a feature/enhancement? - Please describe the impact this feature/enhancement will have on the user experience and/or the product as a whole. - Provide a user story to illustrate the use case for this feature/enhancement. Include examples to help communicate the intended functionality. --> <!-- OPTIONAL: Is this a bug? Please uncomment and include the following: - **Current behavior:** - **Expected behavior:** - **Steps to reproduce:** - **Additional information:** please include VSCode version, browser dev tool logs, etc that might be helpful to debug the issue! --> ## Acceptance criteria - [ ] deprecated fields removed from GraphQL ## Implementation plan <!-- NOTE: Feel free to expand with more sections and headers as needed --> <!-- DO NOT TOUCH BELOW -->
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