Remove a Chef 13-ism

Signed-off-by: Tim Smith <tsmith@chef.io>

1 files changed, 0 insertions, 6 deletions

diff --git a/lib/chef/resource/swap_file.rb b/lib/chef/resource/swap_file.rb
index 813ad33113..fdf13212f8 100644
--- a/lib/chef/resource/swap_file.rb
+++ b/lib/chef/resource/swap_file.rb
@@ -187,12 +187,6 @@ class Chef
           compatible_filesystems.any? { |fs| result.include? fs }
         end
 
-        # we can remove this when we only support Chef 13
-        def docker?(node = run_context.nil? ? nil : run_context.node)
-          !!(node && node["virtualization"] && node["virtualization"]["systems"] &&
-             node["virtualization"]["systems"]["docker"] && node["virtualization"]["systems"]["docker"] == "guest")
-        end
-
         def persist?
           !!new_resource.persist
         end