version section is not mandatory. thanks you, @equal-l2!

Author: nyuichi

util/release-engineering.sh

@@ -47,8 +47,7 @@ else
 fi
 
 sed -i "" -e "4 s@.*@  url \"$URL\"@g" noah.rb
-sed -i "" -e "5 s@.*@  version \"$VERSION\"@g" noah.rb
-sed -i "" -e "6 s@.*@  sha256 \"$SHA256\"@g" noah.rb
+sed -i "" -e "5 s@.*@  sha256 \"$SHA256\"@g" noah.rb
 
 git add noah.rb
 git commit -m "version $VERSION"