Remove duplicated parameter description [ci skip]

doc/api/projects.md

@@ -664,7 +664,6 @@ Parameters:
 | `path` | string | no | Custom repository name for new project. By default generated based on name |
 | `default_branch` | string | no | `master` by default |
 | `namespace_id` | integer | no | Namespace for the new project (defaults to the current user's namespace) |
-| `default_branch` | string | no | `master` by default |
 | `description` | string | no | Short project description |
 | `issues_enabled` | boolean | no | Enable issues for this project |
 | `merge_requests_enabled` | boolean | no | Enable merge requests for this project |