treewide: remove redundant quotes

nixos/modules/virtualisation/brightbox-image.nix

@@ -111,7 +111,7 @@ in
   # Always include cryptsetup so that NixOps can use it.
   environment.systemPackages = [ pkgs.cryptsetup ];
 
-  systemd.services."fetch-ec2-data" =
+  systemd.services.fetch-ec2-data =
     { description = "Fetch EC2 Data";
 
       wantedBy = [ "multi-user.target" "sshd.service" ];

nixos/modules/virtualisation/containers.nix

@@ -686,7 +686,7 @@ in
       serviceConfig = serviceDirectives dummyConfig;
     };
   in {
-    systemd.targets."multi-user".wants = [ "machines.target" ];
+    systemd.targets.multi-user.wants = [ "machines.target" ];
 
     systemd.services = listToAttrs (filter (x: x.value != null) (
       # The generic container template used by imperative containers

nixos/modules/virtualisation/ec2-data.nix

@@ -64,7 +64,7 @@ with lib;
         serviceConfig.RemainAfterExit = true;
       };
 
-    systemd.services."print-host-key" =
+    systemd.services.print-host-key =
       { description = "Print SSH Host Key";
         wantedBy = [ "multi-user.target" ];
         after = [ "sshd.service" ];

nixos/modules/virtualisation/kvmgt.nix

@@ -35,7 +35,7 @@ in {
           and find info about device via <command>cat /sys/bus/pci/devices/*/mdev_supported_types/i915-GVTg_V5_4/description</command>
         '';
         example = {
-          "i915-GVTg_V5_8" = {
+          i915-GVTg_V5_8 = {
             uuid = "a297db4a-f4c2-11e6-90f6-d3b88d6c9525";
           };
         };

nixos/modules/virtualisation/virtualbox-host.nix

@@ -122,7 +122,7 @@ in
 
     # Since we lack the right setuid/setcap binaries, set up a host-only network by default.
   } (mkIf cfg.addNetworkInterface {
-    systemd.services."vboxnet0" =
+    systemd.services.vboxnet0 =
       { description = "VirtualBox vboxnet0 Interface";
         requires = [ "dev-vboxnetctl.device" ];
         after = [ "dev-vboxnetctl.device" ];

nixos/modules/virtualisation/vmware-guest.nix

@@ -33,7 +33,7 @@ in
         serviceConfig.ExecStart = "${open-vm-tools}/bin/vmtoolsd";
       };
 
-    environment.etc."vmware-tools".source = "${open-vm-tools}/etc/vmware-tools/*";
+    environment.etc.vmware-tools.source = "${open-vm-tools}/etc/vmware-tools/*";
 
     services.xserver = mkIf (!cfg.headless) {
       videoDrivers = mkOverride 50 [ "vmware" ];