Remove the temporary support-access window from the Support Access settings

Remove the temporary support-access window from the Support Access settings: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). We've decided to drop the temporary-window concept. Going forward the only way to grant Sentry employees access to an organization should be…

The task

We've decided to drop the temporary-window concept. Going forward the only way to grant Sentry employees access to an organization should be the on/off toggle — there is no "open access for the next N hours/days" flow anymore.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.