97281a746606 removed this option that was available since 3255a31c30a2.
Closes#12910
(grafted from b835e9473ea18bfcc8aa10b58bca7edb544e0a88)
--HG--
branch : 7.0
get_required_version does not need to use .dev0 suffix anymore.
The download URL must be empty for development version.
Source Code must point to Heptapod repository.
Foundation email is used as author email.