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())
 		},
 	}
 }