diff --git a/gen/main.go b/gen/main.go
index 61f41beec..9548344fd 100644
--- a/gen/main.go
+++ b/gen/main.go
@@ -12,7 +12,6 @@ import (
 	"github.com/filecoin-project/lotus/chain/types"
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
 	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
-	"github.com/filecoin-project/lotus/lib/backupds"
 	"github.com/filecoin-project/lotus/node/hello"
 	"github.com/filecoin-project/lotus/paychmgr"
 )
@@ -105,12 +104,4 @@ func main() {
 		fmt.Println(err)
 		os.Exit(1)
 	}
-
-	err = gen.WriteTupleEncodersToFile("./lib/backupds/cbor_gen.go", "backupds",
-		backupds.Entry{},
-	)
-	if err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
 }
diff --git a/lib/backupds/cbor_gen.go b/lib/backupds/cbor.go
similarity index 79%
rename from lib/backupds/cbor_gen.go
rename to lib/backupds/cbor.go
index d6cb6f4d3..09e0058fe 100644
--- a/lib/backupds/cbor_gen.go
+++ b/lib/backupds/cbor.go
@@ -1,21 +1,12 @@
-// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
-
 package backupds
 
 import (
 	"fmt"
 	"io"
-	"sort"
 
-	cid "github.com/ipfs/go-cid"
 	cbg "github.com/whyrusleeping/cbor-gen"
-	xerrors "golang.org/x/xerrors"
 )
 
-var _ = xerrors.Errorf
-var _ = cid.Undef
-var _ = sort.Sort
-
 var lengthBufEntry = []byte{131}
 
 func (t *Entry) MarshalCBOR(w io.Writer) error {
@@ -29,11 +20,6 @@ func (t *Entry) MarshalCBOR(w io.Writer) error {
 
 	scratch := make([]byte, 9)
 
-	// t.Key ([]uint8) (slice)
-	if len(t.Key) > cbg.ByteArrayMaxLen {
-		return xerrors.Errorf("Byte array in field t.Key was too long")
-	}
-
 	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajByteString, uint64(len(t.Key))); err != nil {
 		return err
 	}
@@ -42,11 +28,6 @@ func (t *Entry) MarshalCBOR(w io.Writer) error {
 		return err
 	}
 
-	// t.Value ([]uint8) (slice)
-	if len(t.Value) > cbg.ByteArrayMaxLen {
-		return xerrors.Errorf("Byte array in field t.Value was too long")
-	}
-
 	if err := cbg.WriteMajorTypeHeaderBuf(scratch, w, cbg.MajByteString, uint64(len(t.Value))); err != nil {
 		return err
 	}
@@ -93,9 +74,6 @@ func (t *Entry) UnmarshalCBOR(r io.Reader) error {
 		return err
 	}
 
-	if extra > cbg.ByteArrayMaxLen {
-		return fmt.Errorf("t.Key: byte array too large (%d)", extra)
-	}
 	if maj != cbg.MajByteString {
 		return fmt.Errorf("expected byte array")
 	}
@@ -114,9 +92,6 @@ func (t *Entry) UnmarshalCBOR(r io.Reader) error {
 		return err
 	}
 
-	if extra > cbg.ByteArrayMaxLen {
-		return fmt.Errorf("t.Value: byte array too large (%d)", extra)
-	}
 	if maj != cbg.MajByteString {
 		return fmt.Errorf("expected byte array")
 	}