fix: Duplicate error message from cobra init boilerplates (#1463)

Author: ANGkeith

cobra/tpl/main.go

@@ -67,7 +67,10 @@ to quickly create a Cobra application.` + "`" + `,
 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
-	cobra.CheckErr(rootCmd.Execute())
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
 }
 
 func init() {