Remove extra error logs when parsing non-EROFS images am: 32b1d7bdcb am: c54d9c6da8

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2592046

Change-Id: Ife73e161fdc99a2083ab4e919fbe6757530e7766
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>