restic/repository: remove Backend() method

internal/repository/repository.go

@@ -579,11 +579,6 @@ func (r *Repository) flushPacks(ctx context.Context) error {
 	return err
 }
 
-// Backend returns the backend for the repository.
-func (r *Repository) Backend() backend.Backend {
-	return r.be
-}
-
 func (r *Repository) Connections() uint {
 	return r.be.Connections()
 }

internal/restic/repository.go

@@ -16,9 +16,6 @@ var ErrInvalidData = errors.New("invalid data returned")
 // Repository stores data in a backend. It provides high-level functions and
 // transparently encrypts/decrypts data.
 type Repository interface {
-
-	// Backend returns the backend used by the repository
-	Backend() backend.Backend
 	// Connections returns the maximum number of concurrent backend operations
 	Connections() uint