What special requirements are you referring to? Are you looking for information on physically removing a plumbed item or something from a regulation perspective?

As a note, it may be worth keeping the eyewash if the space may change in the future e.g. a vacant lab which may be occupied again.

Unless it's location is creating an issue with space or new operations, I would leave it in place, but clearly mark out of service. That way, it's clear that it doesn't need to be routinely inspected and there would be no question on using it in an emergency.

If you have a site map of your emergency equipment, update it to signify that those eyewashes are out of service. You can review with your site to communicate the change and document the communication.

Cut and capped and be sure to document the decision process to protect you and your company.

Some eye wash supplies will have a tempering valve located in a wall or under a sink. This blends hot and cold water to a lukewarm temp for the user's comfort. If the hazard does not exist, you can remove the eyewash, but I'd suggest labelling the stub out if there is a tempering valve somewhere.