remove most useDHCP=false settings

networking.useDHCP was deprecated, and then later undeprecated: it's safe to keep it defaulted

hosts/by-name/servo/net.nix

@@ -27,9 +27,7 @@ in
     # view refused packets with: `sudo journalctl -k`
     # networking.firewall.logRefusedPackets = true;
 
-    # The global useDHCP flag is deprecated, therefore explicitly set to false here.
-    # Per-interface useDHCP will be mandatory in the future, so this generated config
-    # replicates the default behaviour.
+    # these useDHCP lines are legacy from the auto-generated config. might be safe to remove now?
     networking.useDHCP = false;
     networking.interfaces.eth0.useDHCP = true;
     # XXX colin: probably don't need this. wlan0 won't be populated unless i touch a value in networking.interfaces.wlan0

hosts/modules/gui/gnome.nix

@@ -21,7 +21,6 @@ in
     services.xserver.displayManager.gdm.enable = true;
 
     # gnome does networking stuff with networkmanager
-    networking.useDHCP = false;
     networking.networkmanager.enable = true;
     networking.wireless.enable = lib.mkForce false;
   };

hosts/modules/gui/phosh.nix

@@ -74,7 +74,6 @@ in
       services.gnome.gnome-online-miners.enable = mkForce false;
 
       # XXX: phosh enables networkmanager by default; can probably disable these lines
-      networking.useDHCP = false;
       networking.networkmanager.enable = true;
       networking.wireless.enable = lib.mkForce false;
 

hosts/modules/gui/sway/default.nix

@@ -260,7 +260,6 @@ in
       # };
       # sane.persist.sys.byStore.plaintext = [ "/var/lib/alsa" ];
 
-      networking.useDHCP = false;
       networking.networkmanager.enable = true;
       networking.wireless.enable = lib.mkForce false;