Fix golangci-lint errors

sessions_test.go

@@ -75,7 +75,6 @@ func TestFlashes(t *testing.T) {
 
 	req, _ = http.NewRequest("GET", "http://localhost:8080/", nil)
 	req.Header.Add("Cookie", cookies[0])
-	rsp = NewRecorder()
 	// Get a session.
 	if session, err = store.Get(req, "session-key"); err != nil {
 		t.Fatalf("Error getting session: %v", err)
@@ -135,7 +134,6 @@ func TestFlashes(t *testing.T) {
 
 	req, _ = http.NewRequest("GET", "http://localhost:8080/", nil)
 	req.Header.Add("Cookie", cookies[0])
-	rsp = NewRecorder()
 	// Get a session.
 	if session, err = store.Get(req, "session-key"); err != nil {
 		t.Fatalf("Error getting session: %v", err)

store.go

@@ -6,7 +6,6 @@ package sessions
 
 import (
 	"encoding/base32"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -261,15 +260,15 @@ func (s *FilesystemStore) save(session *Session) error {
 	filename := filepath.Join(s.path, "session_"+session.ID)
 	fileMutex.Lock()
 	defer fileMutex.Unlock()
-	return ioutil.WriteFile(filename, []byte(encoded), 0600)
+	return os.WriteFile(filename, []byte(encoded), 0600)
 }
 
 // load reads a file and decodes its content into session.Values.
 func (s *FilesystemStore) load(session *Session) error {
 	filename := filepath.Join(s.path, "session_"+session.ID)
 	fileMutex.RLock()
 	defer fileMutex.RUnlock()
-	fdata, err := ioutil.ReadFile(filename)
+	fdata, err := os.ReadFile(filename)
 	if err != nil {
 		return err
 	}