rust: remove redundant format in unreachable am: ff062d54f9 am: 7d8dde4b8f am: 2d4d0158ac am: 0a1a6fd4ae am: c4744ab7c4

Original change: https://android-review.googlesource.com/c/platform/external/minijail/+/2058807

Change-Id: I189c1f1a48ba08d9d17129215cfd59f398ec89f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>