Cleanup license metadata in external/rust/crates/clap_derive. am: 4073e38c42

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/clap_derive/+/3202243

Change-Id: Ifb6d8fd83dcda01ed62ad95791bda7b988b5696a
Signed-off-by: Automerger Merge Worker <[email protected]>