chore: Extract generator into google-apis-generator gem (#2143)

google-api-client/google-api-client.gemspec

@@ -16,16 +16,13 @@ Gem::Specification.new do |gem|
   gem.files         = Dir.glob("lib/**/*") +
                       Dir.glob("generated/**/*.rb") +
                       Dir.glob("docs/**/*") +
-                      Dir.glob("bin/**/*") +
                       Dir.glob("*.md") +
                       [".yardopts", "LICENSE"]
 
-  gem.executables   = gem.files.grep(%r{^bin/}) { |f| File.basename(f) }
   gem.require_paths = %w[lib generated]
 
   gem.required_ruby_version = '>= 2.4'
 
   gem.add_runtime_dependency 'google-apis-core', '~> 0.1'
-  gem.add_development_dependency 'thor', '~> 0.19'
-  gem.add_development_dependency 'activesupport', '>= 4.2', '< 5.1'
+  gem.add_runtime_dependency 'google-apis-generator', '~> 0.1'
 end