chore: remove xerrors

Author: Stebalien

fslock.go

@@ -1,6 +1,7 @@
 package fslock
 
 import (
+	"errors"
 	"io"
 	"os"
 	"path/filepath"
@@ -10,7 +11,6 @@ import (
 	util "github.com/ipfs/go-ipfs-util"
 	logging "github.com/ipfs/go-log"
 	lock "go4.org/lock"
-	"golang.org/x/xerrors"
 )
 
 // log is the fsrepo logger
@@ -78,7 +78,7 @@ func Locked(confdir, lockFile string) (bool, error) {
 
 	log.Debug(err)
 
-	if xerrors.As(err, new(LockedError)) {
+	if errors.As(err, new(LockedError)) {
 		return true, nil
 	}
 	return false, err

go.mod

@@ -4,7 +4,6 @@ require (
 	github.com/ipfs/go-ipfs-util v0.0.1
 	github.com/ipfs/go-log v1.0.4
 	go4.org v0.0.0-20200411211856-f5505b9728dd
-	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 )
 
-go 1.12
+go 1.13