Remove meter hardware.network.bandwidth.bytes

The metering is just the speed of nic, if the nic is Gigabit-NIC,
the value will always be Gigabit:) and it is better to shown in
the metadata.

Change-Id: Iaf95f4e9a0ff0a36fe1e8d03d5c87bf5b24bd24b
Closes-Bug: #1331001
Merge "Remove meter hardware.network.bandwidth.bytes"