Don't publish to releaseboard

  Related to sul-dlss/operations-tasks#112

Gemfile.lock

@@ -85,8 +85,6 @@ GEM
     capistrano-rails (1.2.3)
       capistrano (~> 3.1)
       capistrano-bundler (~> 1.1)
-    capistrano-releaseboard (0.0.1)
-      faraday
     capistrano-shared_configs (0.1.2)
     concurrent-ruby (1.0.5)
     config (1.4.0)
@@ -104,11 +102,10 @@ GEM
     deprecation (0.2.2)
       activesupport
     diff-lcs (1.3)
-    dlss-capistrano (3.4.0)
+    dlss-capistrano (3.4.1)
       capistrano (~> 3.0)
       capistrano-bundle_audit (>= 0.1.0)
       capistrano-one_time_key
-      capistrano-releaseboard
       capistrano-shared_configs
     docile (1.1.5)
     docopt (0.5.0)