Currently Special:EntityData has 2 different ways to request a specific revision.
I propose that we either entirely remove one, or redirect requests that use one to use the other.
The motivations behind this change would be:
- remove the redundancy / confusions of looking at requests that have different parameters that do the same thing
- Allow for more cache hits (currently is revision=1 is used and then oldid=1 is used, this results in an unneeded varnish miss)