Rename unused variables to resolve lint warnings

Signed-off-by: Austin Vazquez <macedonv@amazon.com>

plugins/main/dummy/dummy.go

@@ -136,7 +136,6 @@ func cmdAdd(args *skel.CmdArgs) error {
 	err = netns.Do(func(_ ns.NetNS) error {
 		return ipam.ConfigureIface(args.IfName, result)
 	})
-
 	if err != nil {
 		return err
 	}
@@ -165,7 +164,6 @@ func cmdDel(args *skel.CmdArgs) error {
 		}
 		return err
 	})
-
 	if err != nil {
 		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
 		// so don't return an error if the device is already removed.

plugins/main/dummy/dummy_test.go

@@ -371,7 +371,7 @@ var _ = Describe("dummy Operations", func() {
 				StdinData:   []byte(fmt.Sprintf(confFmt, ver)),
 			}
 
-			_ = originalNS.Do(func(netNS ns.NetNS) error {
+			_ = originalNS.Do(func(_ ns.NetNS) error {
 				defer GinkgoRecover()
 
 				_, _, err = testutils.CmdAddWithArgs(args, func() error {