remove all dead codes (#5019)

Fixes #5012

pkg/disk/disk.go

@@ -29,11 +29,3 @@ type Info struct {
 	Ffree  uint64
 	FSType string
 }
-
-func b2s(bs []int8) string {
-	b := make([]byte, len(bs))
-	for i, v := range bs {
-		b[i] = byte(v)
-	}
-	return string(b)
-}

pkg/madmin/lock-commands.go

@@ -28,18 +28,8 @@ import (
 
 type statusType string
 
-const (
-	runningStatus statusType = "Running"
-	blockedStatus statusType = "Blocked"
-)
-
 type lockType string
 
-const (
-	debugRLockStr lockType = "RLock"
-	debugWLockStr lockType = "WLock"
-)
-
 // OpsLockState - represents lock specific details.
 type OpsLockState struct {
 	OperationID string     `json:"id"`     // String containing operation ID.