Remove AccountPasswordStore and related flows (#28750)

* Remove AccountPasswordStore and related flows

As they are no longer needed since MSC3967

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Improve coverage

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update src/CreateCrossSigning.ts

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

* Update comment

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

src/stores/SetupEncryptionStore.ts

@@ -19,7 +19,6 @@ import { Device, SecretStorage } from "matrix-js-sdk/src/matrix";
 
 import { MatrixClientPeg } from "../MatrixClientPeg";
 import { AccessCancelledError, accessSecretStorage } from "../SecurityManager";
-import { SdkContextClass } from "../contexts/SDKContext";
 import { asyncSome } from "../utils/arrays";
 import { initialiseDehydration } from "../utils/device/dehydration";
 
@@ -239,7 +238,6 @@ export class SetupEncryptionStore extends EventEmitter {
                 {
                     forceReset: true,
                     resetCrossSigning: true,
-                    accountPassword: SdkContextClass.instance.accountPasswordStore.getPassword(),
                 },
             );
         } catch (e) {