fetch-vendor-package.sh: Remove the older vendor-package am: 815210a13a am: f2fc6fb581 am: 93bdfacfc6 am: 538d7a0192

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

Change-Id: Iba77001f4a6dbbfbffb77dff8880faf350ee800f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>