Remove Ruby version constraint workarounds
Created by: pirj
The point of this PR is to remove workaround previously needed to work around Rubygems API not providing necessary gem Ruby constraints under certain conditions.
The problem was presumably fixed in Rubygems. A couple of passed builds have no odd gem version resolutions resulting in Ruby version incompatibility.
Siblings: https://github.com/rspec/rspec-rails/pull/2380 https://github.com/rspec/rspec-rails/pull/2386