refactor: simplify imports and clean up code formatting in main.go

cmd/kat-agent/main.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"context"
-	"encoding/base64"
-	"encoding/json"
 	"fmt"
 	"log"
 	"net/http"
@@ -53,10 +51,10 @@ and obtains the necessary credentials to participate in the cluster.`,
 	nodeName          string
 
 	// Join command flags
-	leaderAPI       string
-	advertiseAddr   string
-	leaderCACert    string
-	etcdPeer        bool
+	leaderAPI     string
+	advertiseAddr string
+	leaderCACert  string
+	etcdPeer      bool
 )
 
 const (