Revert "Import xml-rs 0.8.3" am: 2fc140166d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/xml-rs/+/1769145

Change-Id: Ice07795d0b0aff650f53dd6592fc51ee2891e34f
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

This tree is empty.