Remove the code which updates resolv.conf for dhcp supplied DNS

Earlier in openbmc stack we did't have the systemd-resolved
which updates the resolv.conf automatically for DHCP supplied
nameservers or static nameservers.

Now openBMC stack is having the systemd-resolved enabled
This code is not required, it is unnecessary overwriting
some entries.

Change-Id: I532a4d00d4ec6dcc32f69f7cc5be0a41378214b8
Signed-off-by: Ratan Gupta <ratagupt@linux.vnet.ibm.com>
7 files changed