Remove test_after_commit gem, it's baked into rails 5 now

Gemfile

@@ -35,6 +35,10 @@ else
 
   gem 'db2fog'
   gem 'unicorn'
+
+  group :test do
+    gem 'test_after_commit' # needed to test Devise callbacks
+  end
 end
 
 gem 'i18n'
@@ -160,7 +164,6 @@ end
 group :test do
   gem 'simplecov', require: false
   gem 'test-prof'
-  gem 'test_after_commit' # needed to test Devise callbacks
   gem 'webmock'
   # See spec/spec_helper.rb for instructions
   # gem 'perftools.rb'

Gemfile_next.lock

@@ -500,8 +500,6 @@ GEM
     test-prof (0.7.5)
     test-unit (3.3.7)
       power_assert
-    test_after_commit (1.1.0)
-      activerecord (>= 3.2)
     thor (0.20.3)
     thread_safe (0.3.6)
     tilt (2.0.10)
@@ -647,7 +645,6 @@ DEPENDENCIES
   stripe
   test-prof
   test-unit (~> 3.3)
-  test_after_commit
   timecop
   uglifier (>= 1.0.3)
   unicorn-rails