Merge pull request #53 from OLIOEX/cleanup-unused-dev-deps

chore: drop unused dev dependencies

Author: jasonbosco

Gemfile

@@ -7,14 +7,10 @@ git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
 # Dev dependencies
 gem 'awesome_print', '~> 1.8'
 gem 'bundler', '>= 2.0'
-gem 'codecov', '~> 0.1'
-gem 'erb'
 gem 'guard', '~> 2.16'
 gem 'guard-rubocop', '~> 1.3'
 gem 'rake', '~> 13.0'
 gem 'rspec', '~> 3.9'
-gem 'rspec_junit_formatter', '~> 0.4'
-gem 'rspec-legacy_formatters', '~> 1.0' # For codecov formatter
 gem 'rubocop', '~> 1.86'
 gem 'rubocop-rspec', '~> 3.9', require: false
 gem 'simplecov', '~> 0.18'