Removed also the in the meanwhile introduced rake task

lib/tasks/karma.rake

 unless Rails.env.production?
   namespace :karma do
     desc 'GitLab | Karma | Generate fixtures for JavaScript tests'
-    task fixtures: ['karma:copy_emojis_from_public_folder', 'karma:rspec_fixtures']
+    task fixtures: ['karma:rspec_fixtures']
     desc 'GitLab | Karma | Generate fixtures using RSpec'
     RSpec::Core::RakeTask.new(:rspec_fixtures, [:pattern]) do |t, args|
@@ -11,14 +11,6 @@ unless Rails.env.production?
       t.rspec_opts = '--format documentation'
     end
-    desc 'GitLab | Karma | Copy emojis file'
-    task :copy_emojis_from_public_folder do
-      # Copying the emojis.json from the public folder
-      fixture_file_name = Rails.root.join('spec/javascripts/fixtures/emojis/emojis.json')
-      FileUtils.mkdir_p(File.dirname(fixture_file_name))
-      FileUtils.cp(Rails.root.join('public/-/emojis/1/emojis.json'), fixture_file_name)
-    end
-
     desc 'GitLab | Karma | Run JavaScript tests'
     task tests: ['yarn:check'] do
       sh "yarn run karma" do |ok, res|