Don't check child-writer stderr, rely on the exit code instead
Don't check child-writer stderr, rely on the exit code instead

Change-type: patch

resin-io/herostratus,resin-io/resin-etcher,resin-io/etcher,resin-io/resin-etcher,resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/etcher