Revert "Added a comment that briefly describes the ArpHander

service and explains some design decisions."

This reverts commit ce8b227502448c0a18e3dc22362e4b42e589ef35.

Change-Id: Iefddf5e9788a54d7691cf0f7d868d01d45a7fb5c
Signed-off-by: Ed Warnicke <eaw@cisco.com>