- Remove deprecated MatrixClient.keyBackupKeyFromPassword call. (#28233)

- The `keyBackupKeyFromPassword` call is bound to the `keyCallback` props in `RestoreKeyBackupDialog` which is not used in `CreateSecretStorageDialog`
- Remove code bound to `keyCallback` props

test/unit-tests/components/views/dialogs/security/CreateSecretStorageDialog-test.tsx

@@ -122,7 +122,6 @@ describe("CreateSecretStorageDialog", () => {
             expect(modalSpy).toHaveBeenCalledWith(
                 RestoreKeyBackupDialog,
                 {
-                    keyCallback: expect.any(Function),
                     showSummary: false,
                 },
                 undefined,
@@ -200,7 +199,6 @@ describe("CreateSecretStorageDialog", () => {
             expect(modalSpy).toHaveBeenCalledWith(
                 RestoreKeyBackupDialog,
                 {
-                    keyCallback: expect.any(Function),
                     showSummary: false,
                 },
                 undefined,