ztk.gemspec in ztk-1.18.3 vs ztk.gemspec in ztk-1.18.4

- old
+ new

@@ -51,9 +51,8 @@
   spec.add_development_dependency("coveralls")
   spec.add_development_dependency("yarjuf")
   spec.add_development_dependency("simplecov-rcov")
 
   spec.add_development_dependency("travis")
-  spec.add_development_dependency("travis-artifacts")
   spec.add_development_dependency("typhoeus", "~> 0.6.7")
   spec.add_development_dependency("websocket-native")
 end