remove all dead codes (#5019)

Fixes #5012

cmd/xl-v1-utils_test.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"encoding/hex"
 	"encoding/json"
-	"errors"
 	"reflect"
 	"strconv"
 	"testing"
@@ -448,44 +447,3 @@ func TestEvalDisks(t *testing.T) {
 	xl := objLayer.(*xlObjects)
 	testShuffleDisks(t, xl)
 }
-
-func testEvalDisks(t *testing.T, xl *xlObjects) {
-	disks := xl.storageDisks
-
-	diskErr := errors.New("some disk error")
-	errs := []error{
-		diskErr, nil, nil, nil,
-		nil, diskErr, nil, nil,
-		diskErr, nil, nil, nil,
-		nil, nil, nil, diskErr,
-	}
-
-	// Test normal setup with some disks
-	// returning errors
-	newDisks := evalDisks(disks, errs)
-	if newDisks[0] != nil ||
-		newDisks[1] != disks[1] ||
-		newDisks[2] != disks[2] ||
-		newDisks[3] != disks[3] ||
-		newDisks[4] != disks[4] ||
-		newDisks[5] != nil ||
-		newDisks[6] != disks[6] ||
-		newDisks[7] != disks[7] ||
-		newDisks[8] != nil ||
-		newDisks[9] != disks[9] ||
-		newDisks[10] != disks[10] ||
-		newDisks[11] != disks[11] ||
-		newDisks[12] != disks[12] ||
-		newDisks[13] != disks[13] ||
-		newDisks[14] != disks[14] ||
-		newDisks[15] != nil {
-		t.Errorf("evalDisks returned incorrect new disk set.")
-	}
-
-	// Test when number of errs doesn't match with number of disks
-	errs = []error{nil, nil, nil, nil}
-	newDisks = evalDisks(disks, errs)
-	if newDisks != nil {
-		t.Errorf("evalDisks returned no nil slice")
-	}
-}