Rollup merge of #145729 - nnethercote:dup-packages, r=calebcartwright

Remove two duplicated crates

These commits remove `toml-0.5.11` and `dirs-sys-0.4.1`. There are later versions of those same crates already in the tree. Found with `cargo tree -d`.

r? ``@jieyouxu``

Author: samueltardieu