Revert "CI: Workaround duplicated release creation"

This reverts commit d1cdd60 until I figured out why it doesn't find the release in the second attempt.

Author: larskanis

lib/ruby_installer/build/release.rb

@@ -105,17 +105,7 @@ def upload_to_github(tag:, repo:, token: nil, files:)
       )
     end
 
-    # Recheck all releases to avoid duplicated release creation
-    release2 = nil
-    (1..100).find do |page|
-      release2 = client.releases(repo, page: page).find{|r| r.tag_name==tag }
-    end
-    # Did we create a second release in parallel?
-    if release.id != release2.id
-      client.delete_release(release.url)
-    end
-
-    old_assets = client.release_assets(release2.url)
+    old_assets = client.release_assets(release.url)
 
     files.each do |fname|
       if old_asset=old_assets.find{|a| a.name == File.basename(fname) }
@@ -124,7 +114,7 @@ def upload_to_github(tag:, repo:, token: nil, files:)
       end
 
       $stderr.print "Uploading #{fname} (#{File.size(fname)} bytes) ... "
-      client.upload_asset(release2.url, fname, content_type: CONTENT_TYPE_FOR_EXT[File.extname(fname)])
+      client.upload_asset(release.url, fname, content_type: CONTENT_TYPE_FOR_EXT[File.extname(fname)])
       $stderr.puts "OK"
     end
   end