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

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

Change-Id: I2626a00ef7fa0197e840069e02e50e16f341706c
Signed-off-by: Automerger Merge Worker <[email protected]>