apf: git rm apf.h - dead code (identical copy of v4/apf.h) am: 702f10e35d

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/3498811

Change-Id: I23333bd347391bf8caedc8995f1126c5f43a9fa4
Signed-off-by: Automerger Merge Worker <[email protected]>