Skip solidus_auth_devise in the Gemfile if it's the current extension

Author: elia

…_dev_support/templates/extension/Gemfile …v_support/templates/extension/Gemfile.ttlib/solidus_dev_support/templates/extension/Gemfile renamed to lib/solidus_dev_support/templates/extension/Gemfile.tt lib/solidus_dev_support/templates/extension/Gemfile renamed to lib/solidus_dev_support/templates/extension/Gemfile.tt

@@ -15,9 +15,10 @@ gem 'solidus_frontend' if branch >= 'v3.2' # rubocop:disable Bundler/DuplicatedG
 # See https://github.com/bundler/bundler/issues/6677
 gem 'rails', '>0.a'
 
+<% if file_name != 'solidus_auth_devise' %>
 # Provides basic authentication functionality for testing parts of your engine
 gem 'solidus_auth_devise'
-
+<% end %>
 case ENV.fetch('DB', nil)
 when 'mysql'
   gem 'mysql2'