Remove redundant Docker image tagging

The image tagging operation was never used anywhere in the codebase.
Tests reference the image via @image.id directly, not by the tag name.

Benefits:
- Slightly faster image builds (no tagging overhead)
- Cleaner code without unused operations
- Reduces confusion about whether tags are needed

All tests pass successfully without the tagging operation.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

Author: chorrell

spec/spec_helper.rb

@@ -1,10 +1,7 @@
 module Helpers
   def create_image(version)
-    
     puts "Building image..."
     @image = Docker::Image.build_from_dir("#{version}/")
-    @image.tag("repo" => "node", "tag" => "#{version}", "force" => true)
-    
 
     set :os, :family => 'debian'
     set :backend, :docker