Remove warning admin access level may be removed

doc/api/protected_branches.md

@@ -12,9 +12,6 @@ The access levels are defined in the `ProtectedRefAccess::ALLOWED_ACCESS_LEVELS`
 60 => Admin access
 ```
 
-**Note:** The admin access level (`60`) may be removed in GitLab 11.0. We are currently evaluating restrictions to
-the Owner role as an alternative.
-
 ## List protected branches
 
 Gets a list of protected branches from a project.