Revert "Support refresh tokens (#7802)"

This reverts commit 839593412c.

src/MatrixClientPeg.ts

@@ -44,8 +44,6 @@ export interface IMatrixClientCreds {
     userId: string;
     deviceId?: string;
     accessToken: string;
-    accessTokenExpiryTs?: number; // set if access token expires
-    accessTokenRefreshToken?: string; // set if access token can be renewed
     guest?: boolean;
     pickleKey?: string;
     freshLogin?: boolean;
@@ -101,14 +99,6 @@ export interface IMatrixClientPeg {
      * @param {IMatrixClientCreds} creds The new credentials to use.
      */
     replaceUsingCreds(creds: IMatrixClientCreds): void;
-
-    /**
-     * Similar to replaceUsingCreds(), but without the replacement operation.
-     * Credentials that can be updated in-place will be updated. All others
-     * will be ignored.
-     * @param {IMatrixClientCreds} creds The new credentials to use.
-     */
-    updateUsingCreds(creds: IMatrixClientCreds): void;
 }
 
 /**
@@ -174,15 +164,6 @@ class MatrixClientPegClass implements IMatrixClientPeg {
         this.createClient(creds);
     }
 
-    public updateUsingCreds(creds: IMatrixClientCreds): void {
-        if (creds?.accessToken) {
-            this.currentClientCreds = creds;
-            this.matrixClient.setAccessToken(creds.accessToken);
-        } else {
-            // ignore, per signature
-        }
-    }
-
     public async assign(): Promise<any> {
         for (const dbType of ['indexeddb', 'memory']) {
             try {
@@ -252,15 +233,7 @@ class MatrixClientPegClass implements IMatrixClientPeg {
     }
 
     public getCredentials(): IMatrixClientCreds {
-        let copiedCredentials = this.currentClientCreds;
-        if (this.currentClientCreds?.userId !== this.matrixClient?.credentials?.userId) {
-            // cached credentials belong to a different user - don't use them
-            copiedCredentials = null;
-        }
         return {
-            // Copy the cached credentials before overriding what we can.
-            ...(copiedCredentials ?? {}),
-
             homeserverUrl: this.matrixClient.baseUrl,
             identityServerUrl: this.matrixClient.idBaseUrl,
             userId: this.matrixClient.credentials.userId,