Xu Cheng 73277e71b1 RubyRequirement: clean up
1. Remove dead code (RubyRequirement always has a version)
2. Perfer `Utils.popen_read` instead of backticks.
2015-05-08 14:41:38 +08:00
..
2015-05-08 14:37:15 +08:00
2015-05-08 14:41:38 +08:00