Merge "Remove unused variable mount_point" am: b634c6f527

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2504916

Change-Id: I0869edab7d6a6e880601bebc15b851c355cb2d81
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>