Use .original_env because .with_clean_env is deprecated

Deprecation warning:
[DEPRECATED] `Bundler.with_clean_env` has been deprecated in favor of `Bundler.with_unbundled_env`. If you instead want the environment before bundler was originally loaded, use `Bundler.with_original_env` (called at spec/integration/integration_spec.rb:40)

Author: drwl

spec/integration/integration_spec.rb

@@ -37,7 +37,7 @@ module Files
       # Don't proceed if the working copy is dirty!
       expect(Annotate::Integration.clean?(test_rig)).to eq(true)
 
-      Bundler.with_clean_env do
+      Bundler.original_env do
         expect(1).to eq(1)
 
         dir base_dir do