Remove unused gems.

cotes2020 · cotes2020 · commit 4bdf3837a5ee · 2020-05-02T19:18:14.000+08:00
diff --git a/Gemfile b/Gemfile
@@ -12,6 +12,3 @@ end
 group :test do
   gem "html-proofer"
 end
-
-# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
