chore: Move google-api-client into a subdirectory

Gemfile

@@ -1,55 +1,4 @@
 source 'https://rubygems.org'
 
-# Specify your gem's dependencies in google-apis.gemspec
-gemspec
-
-
-group :development do
-  gem 'bundler', '>= 1.7'
-  gem 'rake', '~> 11.2'
-  gem 'rspec', '~> 3.1'
-  gem 'json_spec', '~> 1.1'
-  gem 'webmock', '~> 2.1'
-  gem 'simplecov', '~> 0.12'
-  gem 'coveralls', '~> 0.8'
-  gem 'rubocop', '~> 0.49.0'
-  gem 'launchy', '~> 2.4'
-  gem 'dotenv', '~> 2.0'
-  gem 'fakefs', '~> 0.6', require: "fakefs/safe"
-  gem 'google-id-token', '~> 1.3'
-  gem 'os', '~> 0.9'
-  gem 'rmail', '~> 1.1'
-  gem 'redis', '~> 3.2'
-  gem 'logging', '~> 2.2'
-  gem 'opencensus', '~> 0.4'
-  gem 'httparty'
-  gem 'gems', '~> 1.2'
-end
-
-platforms :jruby do
-  group :development do
-    gem 'jruby-openssl'
-  end
-end
-
-platforms :ruby do
-  group :development do
-    gem 'yard', '~> 0.9', '>= 0.9.11'
-    gem 'redcarpet', '~> 3.2'
-    gem 'github-markup', '~> 1.3'
-    gem 'pry-doc', '~> 0.8'
-    gem 'pry-byebug', '~> 3.2'
-  end
-end
-
-platforms :mri_21, :mri_22, :mri_23 do
-  group :development do
-    gem 'derailed_benchmarks'
-    gem 'stackprof'
-    gem 'rack-test'
-  end
-end
-
-if ENV['RAILS_VERSION']
-  gem 'rails', ENV['RAILS_VERSION']
-end
+gem "rake", "~> 13.0"
+gem "gems", "~> 1.2"