Re-run cargo_embargo to remove duplicate cfgs. am: aa1c03805c am: cd323b97c3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/mls-rs-core/+/3084136

Change-Id: Ia4fe426da7899bede5622810574e7e517bc7ed28
Signed-off-by: Automerger Merge Worker <[email protected]>