client: Remove IsErrXXX functions

Signed-off-by: Evgenii Baidakov <evgenii@nspcc.io>

client/errors.go

@@ -1,99 +1,9 @@
 package client
 
 import (
-	"errors"
 	"fmt"
-
-	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
 )
 
-// unwraps err using errors.Unwrap and returns the result.
-func unwrapErr(err error) error {
-	for e := errors.Unwrap(err); e != nil; e = errors.Unwrap(err) {
-		err = e
-	}
-
-	return err
-}
-
-// IsErrContainerNotFound checks if err corresponds to NeoFS status
-// return corresponding to missing container. Supports wrapped errors.
-func IsErrContainerNotFound(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.ContainerNotFound,
-		*apistatus.ContainerNotFound:
-		return true
-	}
-}
-
-// IsErrEACLNotFound checks if err corresponds to NeoFS status
-// return corresponding to missing eACL table. Supports wrapped errors.
-func IsErrEACLNotFound(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.EACLNotFound,
-		*apistatus.EACLNotFound:
-		return true
-	}
-}
-
-// IsErrObjectNotFound checks if err corresponds to NeoFS status
-// return corresponding to missing object. Supports wrapped errors.
-func IsErrObjectNotFound(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.ObjectNotFound,
-		*apistatus.ObjectNotFound:
-		return true
-	}
-}
-
-// IsErrObjectAlreadyRemoved checks if err corresponds to NeoFS status
-// return corresponding to already removed object. Supports wrapped errors.
-func IsErrObjectAlreadyRemoved(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.ObjectAlreadyRemoved,
-		*apistatus.ObjectAlreadyRemoved:
-		return true
-	}
-}
-
-// IsErrSessionExpired checks if err corresponds to NeoFS status return
-// corresponding to expired session. Supports wrapped errors.
-func IsErrSessionExpired(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.SessionTokenExpired,
-		*apistatus.SessionTokenExpired:
-		return true
-	}
-}
-
-// IsErrSessionNotFound checks if err corresponds to NeoFS status return
-// corresponding to missing session. Supports wrapped errors.
-func IsErrSessionNotFound(err error) bool {
-	switch unwrapErr(err).(type) {
-	default:
-		return false
-	case
-		apistatus.SessionTokenNotFound,
-		*apistatus.SessionTokenNotFound:
-		return true
-	}
-}
-
 // returns error describing missing field with the given name.
 func newErrMissingResponseField(name string) error {
 	return fmt.Errorf("missing %s field in the response", name)