ethernet_interface: Remove DHCP from constructor

It should be set or configured just like all other parameters.

Change-Id: Ic93de4e80b4da0de2e97b9655c424fa55a6844bf
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/src/network_manager.cpp b/src/network_manager.cpp
index 7d288be..86d892f 100644
--- a/src/network_manager.cpp
+++ b/src/network_manager.cpp
@@ -133,7 +133,7 @@
         config::Parser config(config::pathForIntfConf(confDir, interface));
 
         auto intf = std::make_shared<phosphor::network::EthernetInterface>(
-            bus, objPath.string(), config, getDHCPValue(config), *this);
+            bus, objPath.string(), config, *this);
 
         intf->createIPAddressObjects();
         intf->createStaticNeighborObjects();