Revert "Merge pull request #7203 from hyuraku/audit_whether_prerelease-or-not"

This reverts commit 081f6cdcd5, reversing
changes made to 12d3a2a2d2.

This fails on some formulae with:
Error: Not Found

See:
https://github.com/Homebrew/homebrew-core/pull/52031

Library/Homebrew/dev-cmd/audit.rb

@@ -795,11 +795,6 @@ module Homebrew
         return if stable_url_minor_version.even?
 
         problem "#{stable.version} is a development release"
-      when %r{^https://github.com/}
-        _, owner, repo, = URI.parse(stable.url).path.split("/")
-        if GitHub.open_api("#{GitHub::API_URL}/repos/#{owner}/#{repo}/releases/tags/#{stable.version}")["prerelease"]
-          problem "#{stable.version} is a GitHub prerelease"
-        end
       end
     end