Remove Deleter interface

internal/backend/azure/azure_test.go

@@ -76,11 +76,7 @@ func newAzureTestSuite(t testing.TB) *test.Suite {
 				return err
 			}
 
-			if err := be.(restic.Deleter).Delete(context.TODO()); err != nil {
-				return err
-			}
-
-			return nil
+			return be.Delete(context.TODO())
 		},
 	}
 }

internal/backend/b2/b2_test.go

@@ -62,11 +62,7 @@ func newB2TestSuite(t testing.TB) *test.Suite {
 				return err
 			}
 
-			if err := be.(restic.Deleter).Delete(context.TODO()); err != nil {
-				return err
-			}
-
-			return nil
+			return be.Delete(context.TODO())
 		},
 	}
 }

internal/backend/gs/gs_test.go

@@ -69,11 +69,7 @@ func newGSTestSuite(t testing.TB) *test.Suite {
 				return err
 			}
 
-			if err := be.(restic.Deleter).Delete(context.TODO()); err != nil {
-				return err
-			}
-
-			return nil
+			return be.Delete(context.TODO())
 		},
 	}
 }

internal/backend/rest/rest.go

@@ -378,5 +378,9 @@ func (b *restBackend) Delete(ctx context.Context) error {
 		}
 	}
 
-	return b.Remove(ctx, restic.Handle{Type: restic.ConfigFile})
+	err := b.Remove(ctx, restic.Handle{Type: restic.ConfigFile})
+	if err != nil && b.IsNotExist(err) {
+		return nil
+	}
+	return err
 }

internal/backend/s3/s3_test.go

@@ -280,11 +280,7 @@ func newS3TestSuite(t testing.TB) *test.Suite {
 				return err
 			}
 
-			if err := be.(restic.Deleter).Delete(context.TODO()); err != nil {
-				return err
-			}
-
-			return nil
+			return be.Delete(context.TODO())
 		},
 	}
 }

internal/backend/swift/swift_test.go

@@ -93,11 +93,7 @@ func newSwiftTestSuite(t testing.TB) *test.Suite {
 				return err
 			}
 
-			if err := be.(restic.Deleter).Delete(context.TODO()); err != nil {
-				return err
-			}
-
-			return nil
+			return be.Delete(context.TODO())
 		},
 	}
 }

internal/repository/repository.go

@@ -591,11 +591,7 @@ func (r *Repository) ListPack(ctx context.Context, id restic.ID) ([]restic.Blob,
 // Delete calls backend.Delete() if implemented, and returns an error
 // otherwise.
 func (r *Repository) Delete(ctx context.Context) error {
-	if b, ok := r.be.(restic.Deleter); ok {
-		return b.Delete(ctx)
-	}
-
-	return errors.New("Delete() called for backend that does not implement this method")
+	return r.be.Delete(ctx)
 }
 
 // Close closes the repository by closing the backend.

internal/restic/repository.go

@@ -44,11 +44,6 @@ type Repository interface {
 	SaveTree(context.Context, *Tree) (ID, error)
 }
 
-// Deleter removes all data stored in a backend/repo.
-type Deleter interface {
-	Delete(context.Context) error
-}
-
 // Lister allows listing files in a backend.
 type Lister interface {
 	List(context.Context, FileType) <-chan string