Revert "Import xml-rs 0.8.3" am: 2fc140166d am: 7a738ad874 am: 47f6bbb6c3 am: b5bfeb33c4

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

Change-Id: Idaca8da10feaac5d4215829a0ce12693be331237
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

This tree is empty.