add version cmd, fix bug for uninstall cmd

cmd/cmd.go

@@ -1,29 +1,12 @@
 package cmd
 
 import (
-	"fmt"
 	"github.com/spf13/cobra"
 	"log"
 )
 
-var (
-	version  = "TempVersion" //use ldflags replace
-	codename = "V2bX"
-	intro    = "A V2board backend based on Xray-core"
-)
-
-func showVersion() {
-	fmt.Printf("%s %s (%s) \n", codename, version, intro)
-	// Warning
-	fmt.Println(Warn("This version need V2board version >= 1.7.0."))
-	fmt.Println(Warn("This version changed config file. Please check config file before running."))
-}
-
 var command = &cobra.Command{
 	Use: "V2bX",
-	PreRun: func(_ *cobra.Command, _ []string) {
-		showVersion()
-	},
 }
 
 func Run() {