Remove the "stem" field from a target definition am: eeec3f50ac am: 29c9599133 am: 422016309a am: 5d0652826f am: a34c82f19d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/log/+/2466634

Change-Id: I3b928adae6c7469e27953a4b61efc6ebeca51393
Signed-off-by: Automerger Merge Worker <[email protected]>