X-Client-Package determines this

web/packages/accounts/services/user.ts

@@ -71,11 +71,10 @@ export interface RecoveryKey {
 export const sendOTT = async (email: string, purpose: "change" | undefined) =>
     ensureOk(
         await fetch(await apiURL("/users/ott"), {
-            headers: publicRequestHeaders(),
             method: "POST",
+            headers: publicRequestHeaders(),
             body: JSON.stringify({
                 email,
-                client: appName == "auth" ? "totp" : "web",
                 purpose: purpose ?? "",
             }),
         }),
@@ -191,14 +190,6 @@ export const changeEmail = async (email: string, ott: string) => {
     );
 };
 
-export const sendOTTForEmailChange = async (email: string) => {
-    await HTTPService.post(await apiURL("/users/ott"), {
-        email,
-        client: "web",
-        purpose: "change",
-    });
-};
-
 export const setupTwoFactor = async () => {
     const resp = await HTTPService.post(
         await apiURL("/users/two-factor/setup"),