grape.gemspec in grape-0.19.2 vs grape.gemspec in grape-1.0.0

@@ -14,12 +14,9 @@
 
   s.add_runtime_dependency 'rack', '>= 1.3.0'
   s.add_runtime_dependency 'mustermann-grape', '~> 1.0.0'
   s.add_runtime_dependency 'rack-accept'
   s.add_runtime_dependency 'activesupport'
-  s.add_runtime_dependency 'multi_json', '>= 1.3.2'
-  s.add_runtime_dependency 'multi_xml', '>= 0.5.2'
-  s.add_runtime_dependency 'hashie', '>= 2.1.0'
   s.add_runtime_dependency 'virtus', '>= 1.0.0'
   s.add_runtime_dependency 'builder'
 
   s.files         = Dir['**/*'].keep_if { |file| File.file?(file) }
   s.test_files    = Dir['spec/**/*']