chore: simplify tests with logtest (#3184)

rest/handler/recoverhandler_test.go

@@ -1,8 +1,6 @@
 package handler
 
 import (
-	"io"
-	"log"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -10,10 +8,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func init() {
-	log.SetOutput(io.Discard)
-}
-
 func TestWithPanic(t *testing.T) {
 	handler := RecoverHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		panic("whatever")