Don't ship the .bundle config in the package

This prevents `bundle install` working correctly on deployment.

Author: pixeltrix

lib/package_builder.rb

@@ -315,7 +315,7 @@ def remove_archive
 
   def remove_artifacts
     args = %w[rm -rf]
-    args.concat %w[log tmp]
+    args.concat %w[.bundle log tmp]
 
     info "Removing build artifacts ..."
     Kernel.system *args