Checker: Go: use sha3 from standard lib

Author: rudis

go/checkerlib/go.mod

@@ -1,7 +1,3 @@
 module github.com/fausecteam/ctf-gameserver/go/checkerlib
 
-go 1.23.0
-
-require golang.org/x/crypto v0.39.0
-
-require golang.org/x/sys v0.33.0 // indirect
+go 1.24.0

go/checkerlib/go.sum

@@ -1,4 +0,0 @@
-golang.org/x/crypto v0.39.0 h1:SHs+kF4LP+f+p14esP5jAoDpHU8Gu/v9lFRK6IT5imM=
-golang.org/x/crypto v0.39.0/go.mod h1:L+Xg3Wf6HoL4Bn4238Z6ft6KfEpN0tJGo53AAPC632U=
-golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
-golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=

go/checkerlib/lib.go

@@ -5,6 +5,7 @@ package checkerlib
 import (
 	"bufio"
 	"bytes"
+	"crypto/sha3"
 	"encoding/base64"
 	"encoding/binary"
 	"encoding/json"
@@ -17,8 +18,6 @@ import (
 	"strconv"
 	"syscall"
 	"time"
-
-	"golang.org/x/crypto/sha3"
 )
 
 const (