fix: un-used args (golangci-lint error)

Author: KEINOS

cmd/cmdhello/cmd_hello.go

@@ -67,7 +67,7 @@ func New() *cobra.Command {
 
 // sayHelloTo prints the greetings to the given args. It is the main function of
 // "hello" command.
-func (c *Command) sayHelloTo(cmd *cobra.Command, args []string) error {
+func (c *Command) sayHelloTo(_ *cobra.Command, args []string) error {
 	msgToGreet := "Hi!"
 
 	if len(args) > 0 {

cmd/cmdhello/cmdworld/cmd_world.go

@@ -74,7 +74,7 @@ func reverseString(input string) string {
 // sayHelloWorld is the main function of "world" command.
 // It prints "Hello, world!" or if "--reverse" flag was set then prints
 // "!dlrow ,olleH".
-func (c *Command) sayHelloWorld(cmd *cobra.Command, args []string) error {
+func (c *Command) sayHelloWorld(_ *cobra.Command, _ []string) error {
 	msgToGreet := "Hello, world!"
 
 	if c.isReverse {