Remove duplicate label

Author: jsf9k

.github/labels.yml

@@ -20,9 +20,6 @@
 - color: "#5319e7"
   description: This issue or pull request improves or adds to documentation
   name: documentation
-- color: "#5319e7"
-  description: This issue or pull request improves or adds to documentation
-  name: documentation
 - color: "#cfd3d7"
   description: This issue or pull request already exists or is covered in another issue or pull request
   name: duplicate