Fix `versionchanged` tags for json.load
`versionchanged` tags about 2.7 are useless in 3.x branches.
H
Hynek Schlawack committed
f54c0604c852c2bf0b4d522cea7d94f205a795e8
Parent: 69d8493
`versionchanged` tags about 2.7 are useless in 3.x branches.