[Pkg-rust-maintainers] rust-native-tls is marked for autoremoval from testing

[Debian testing autoremoval watch]

rust-native-tls 0.2.3-1 is marked for autoremoval from testing on 2020-06-01

It is affected by these RC bugs:
959653: rust-native-tls: FTBFS: build-dependency not installable: librust-security-framework-sys-0.3+default-dev (>= 0.3.1-~~)