Revert working copy of gemspec file

zuora.gemspec

@@ -20,12 +20,6 @@ Gem::Specification.new do |s|
   s.test_files  = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.extra_rdoc_files = ['README.md']
 
-  s.add_dependency 'activemodel', '~> 5.0.7'
-  s.add_dependency 'activesupport', '~> 5.0.7'
-  s.add_dependency 'httpi'
-  s.add_dependency 'i18n', '~> 1.5.1'
-  s.add_dependency 'libxml4r', '~> 0.2.6'
-  s.add_dependency 'savon', '~> 2.15.0'
   s.add_development_dependency 'appraisal'
   s.add_development_dependency 'artifice', '~> 0.6.0'
   s.add_development_dependency 'factory_bot'
@@ -37,7 +31,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'redcarpet', '~> 2.1.0'
   s.add_development_dependency 'rspec', '~> 3.0'
   s.add_development_dependency 'simplecov', '~> 0.22.0'
-  s.add_development_dependency 'sqlite3'
   s.add_development_dependency 'test-unit'
   s.add_development_dependency 'yard', '~> 0.7.5'
   s.add_dependency 'akami', '~> 1.3.2'
@@ -47,4 +40,4 @@ Gem::Specification.new do |s|
   s.add_dependency 'rack', '< 3.0'
   s.add_dependency 'savon', '~> 2.0'
   s.add_dependency 'wasabi', '~> 3.0'
-end
+end