Temporary removed minitest from bundled gems.

It requires Ruby 2.x. https://github.com/seattlerb/minitest/blob/master/Rakefile#L14
2020-08-31 17:18:14 +09:00 · 2020-08-31 17:18:14 +09:00 · 3e1aea4613
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@ -1,4 +1,3 @@
-minitest 5.14.1 https://github.com/seattlerb/minitest
 power_assert 1.2.0 https://github.com/ruby/power_assert
 rake 13.0.1 https://github.com/ruby/rake
 test-unit 3.3.6 https://github.com/test-unit/test-unit