Incorrect use of `deprecated` attribute

[estebank]

rust-lang/rust#56896 is making the correct use of deprecated mandatory in rustc. We can't apply this as a hard error due to the following use in kiss3d:

[INFO] [stderr] error: expected meta item sequence
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/kiss3d-0.17.0/src/window/window.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 |     #[deprecated = "Use `remove_node` instead."]
[INFO] [stderr]     |     ^^-----------------------------------------^
[INFO] [stderr]     |       |
[INFO] [stderr]     |       help: use the `note` key: `deprecated(note = "Use `remove_node` instead.")`

[sebcrozet]

This is now fixed in the version 0.17.1 of kiss3d.