[API] Clean up index without the 7.x update

Author: picandocodigo

api-spec-testing/test_file.rb

@@ -178,10 +178,6 @@ def clear_machine_learning_indices(client)
 
         def clear_index_templates(client)
           client.indices.delete_template(name: '*')
-          templates = client.indices.get_index_template
-          templates['index_templates'].each do |template|
-            client.indices.delete_index_template(name: template['name'])
-          end
         end
 
         def clear_snapshots_and_repositories(client)