fetch-vendor-package.sh: Remove the older vendor-package am: 815210a13a am: f2fc6fb581

Original change: https://android-review.googlesource.com/c/device/linaro/hikey/+/2146079

Change-Id: Iac348f2ced78ea7df786035cd3588cbec1901362
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>