apf v5: remove spurious check for >=0 of unsigned value. am: 716a56c587

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/2859365

Change-Id: I783d83cbec9da338a44f6fbd7df72372dab5d634
Signed-off-by: Automerger Merge Worker <[email protected]>