Remove rockpi related artifacts am: e833c69919

Original change: https://android-review.googlesource.com/c/device/google/cuttlefish_prebuilts/+/2924670

Change-Id: I08acbe9ebab957a263a7b7ef8f166001a7e146bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>