Don't need to declare bundler on Gemfile

hsbt · hsbt · commit 1438ebd0bb2f · 2023-06-16T08:36:12.000+09:00
diff --git a/Gemfile b/Gemfile
@@ -3,7 +3,6 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
-  gem "bundler"
   gem "minitest"
   gem "coveralls"
   gem "rubocop"
