Revert "Seed specific Fedora network configuration"

This reverts commit 4ba28063a7a2f976e6cab3a48e81ea74a18ef6fb.

The new plan is to use the DIB baremetal element to enable
stable interface names by default on all distros... so
no need to disable them as a special case for the seed.

Change-Id: I57284f86988a634275d3b93f9eb37d69a9e3c156
Merge "Revert "Seed specific Fedora network configuration""