ref: 2294a2e995e2d176a8377ad6c968c165f346b01e
parent: 2ca41bd903667cd465954a02769802a72184a0a0
author: Jingning Han <jingning@google.com>
date: Wed Jul 25 04:14:43 EDT 2018
Clean up get_overlap_area function Remove unneeded variable definition. Change-Id: Ifc8097b249acee86301e2040df8d39ecaca5ab17