fix: remove deprecated function rand.Seed (#12271)

Signed-off-by: neosu <neo@tcodestudio.com>

.golangci.yml

@@ -58,8 +58,6 @@ linters-settings:
       # G601: Implicit memory aliasing in for loop.
       - G601
 issues:
-  exclude:
-    - "SA1019: rand.Seed has been deprecated since Go 1.20"
   exclude-rules:
     - path: server/artifacts/artifact_server_test.go
       text: "response body must be closed"

workflow/util/util.go

@@ -602,10 +602,6 @@ func updateSuspendedNode(ctx context.Context, wfIf v1alpha1.WorkflowInterface, h
 
 const letters = "abcdefghijklmnopqrstuvwxyz0123456789"
 
-func init() {
-	rand.Seed(time.Now().UnixNano())
-}
-
 // generates an insecure random string
 func randString(n int) string {
 	b := make([]byte, n)