FEATURE: remove the timecop gem

We should only have one way of mocking time, misuse of timecop
was causing build stability issues

script/require_profiler.rb

@@ -115,7 +115,7 @@ end
 RequireProfiler.profile do
   Bundler.definition.dependencies.each do |dep|
     begin
-      require dep.name unless dep.name =~ /timecop/
+      require dep.name
     rescue Exception
       # don't care
     end