Remove redundant MSC implementation for io.element.rendezvous (#28583)

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

src/components/views/auth/LoginWithQR.tsx

@@ -108,12 +108,9 @@ export default class LoginWithQR extends React.Component<IProps, IState> {
     private generateAndShowCode = async (): Promise<void> => {
         let rendezvous: MSC4108SignInWithQR;
         try {
-            const fallbackRzServer = this.props.client?.getClientWellKnown()?.["io.element.rendezvous"]?.server;
-
             const transport = new MSC4108RendezvousSession({
                 onFailure: this.onFailure,
                 client: this.props.client,
-                fallbackRzServer,
             });
             await transport.send("");
             const channel = new MSC4108SecureChannel(transport, undefined, this.onFailure);

src/components/views/settings/devices/LoginWithQRSection.tsx

@@ -7,13 +7,7 @@ Please see LICENSE files in the repository root for full details.
 */
 
 import React from "react";
-import {
+import { IServerVersions, OidcClientConfig, MatrixClient, DEVICE_CODE_SCOPE } from "matrix-js-sdk/src/matrix";
-    IServerVersions,
-    IClientWellKnown,
-    OidcClientConfig,
-    MatrixClient,
-    DEVICE_CODE_SCOPE,
-} from "matrix-js-sdk/src/matrix";
 import QrCodeIcon from "@vector-im/compound-design-tokens/assets/web/icons/qr-code";
 import { Text } from "@vector-im/compound-web";
 
@@ -25,7 +19,6 @@ import { useMatrixClientContext } from "../../../../contexts/MatrixClientContext
 interface IProps {
     onShowQr: () => void;
     versions?: IServerVersions;
-    wellKnown?: IClientWellKnown;
     oidcClientConfig?: OidcClientConfig;
     isCrossSigningReady?: boolean;
 }
@@ -35,10 +28,8 @@ export function shouldShowQr(
     isCrossSigningReady: boolean,
     oidcClientConfig?: OidcClientConfig,
     versions?: IServerVersions,
-    wellKnown?: IClientWellKnown,
 ): boolean {
-    const msc4108Supported =
+    const msc4108Supported = !!versions?.unstable_features?.["org.matrix.msc4108"];
-        !!versions?.unstable_features?.["org.matrix.msc4108"] || !!wellKnown?.["io.element.rendezvous"]?.server;
 
     const deviceAuthorizationGrantSupported =
         oidcClientConfig?.metadata?.grant_types_supported.includes(DEVICE_CODE_SCOPE);
@@ -51,15 +42,9 @@ export function shouldShowQr(
     );
 }
 
-const LoginWithQRSection: React.FC<IProps> = ({
+const LoginWithQRSection: React.FC<IProps> = ({ onShowQr, versions, oidcClientConfig, isCrossSigningReady }) => {
-    onShowQr,
-    versions,
-    wellKnown,
-    oidcClientConfig,
-    isCrossSigningReady,
-}) => {
     const cli = useMatrixClientContext();
-    const offerShowQr = shouldShowQr(cli, !!isCrossSigningReady, oidcClientConfig, versions, wellKnown);
+    const offerShowQr = shouldShowQr(cli, !!isCrossSigningReady, oidcClientConfig, versions);
 
     return (
         <SettingsSubsection heading={_t("settings|sessions|sign_in_with_qr")}>

src/components/views/settings/tabs/user/SessionManagerTab.tsx

@@ -6,7 +6,7 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
 Please see LICENSE files in the repository root for full details.
 */
 
-import React, { lazy, Suspense, useCallback, useContext, useEffect, useMemo, useRef, useState } from "react";
+import React, { lazy, Suspense, useCallback, useContext, useEffect, useRef, useState } from "react";
 import { discoverAndValidateOIDCIssuerWellKnown, MatrixClient } from "matrix-js-sdk/src/matrix";
 import { logger } from "matrix-js-sdk/src/logger";
 import { defer } from "matrix-js-sdk/src/utils";
@@ -184,7 +184,6 @@ const SessionManagerTab: React.FC<{
     const userId = matrixClient?.getUserId();
     const currentUserMember = (userId && matrixClient?.getUser(userId)) || undefined;
     const clientVersions = useAsyncMemo(() => matrixClient.getVersions(), [matrixClient]);
-    const wellKnown = useMemo(() => matrixClient?.getClientWellKnown(), [matrixClient]);
     const oidcClientConfig = useAsyncMemo(async () => {
         try {
             const authIssuer = await matrixClient?.getAuthIssuer();
@@ -305,7 +304,6 @@ const SessionManagerTab: React.FC<{
                 <LoginWithQRSection
                     onShowQr={onShowQrClicked}
                     versions={clientVersions}
-                    wellKnown={wellKnown}
                     oidcClientConfig={oidcClientConfig}
                     isCrossSigningReady={isCrossSigningReady}
                 />

test/unit-tests/components/views/settings/devices/LoginWithQRSection-test.tsx

@@ -56,7 +56,6 @@ describe("<LoginWithQRSection />", () => {
             const defaultProps = {
                 onShowQr: () => {},
                 versions: makeVersions({ "org.matrix.msc4108": true }),
-                wellKnown: {},
             };
 
             const getComponent = (props = {}) => <LoginWithQRSection {...defaultProps} {...props} />;