The question in the OP was trying to gather information, not get a verdict per say,
If the building was doing a complete remodel and update, would not that trigger full compliance and as thus for the AHJ no elevator required.
However, does the Texas State Access code require it to be maintained no different than an extra stairway provided over the required minimum?
Hence if there, must it be maintained is the question.
As thus, could a non-required stair flight be closed off and removed? Then why not an elevator?
And if removed, could it not be turned into a storage closet for the Maintenace of the building on each floor level?
Not familiar with what Texas requires, but any elevator I have seen installed, must be maintained, as to it being allowed to be shut down and removed I haven't a clue, just questioning why not, when not required in the first place?