Remove unnecessary Rust prebuilt modules. am: 2a5ae6aa4c am: 871ffe4e53 am: 28336a96dd
am: 9ce357c885

Change-Id: I345b516b86a3e23ed82c6ce0d2e409507edcc45a
tree: ca60f65edf43c09d12297cce357d62cb7cd9a96d
  1. bootstrap/
  2. linux-x86/