[web] remove unused link=false flag from /user/oauth-unlink (#36566)

GitOrigin-RevId: 5a8af17bf339df62a6cf54d6c372bff4cbe88eb3

services/web/frontend/js/features/settings/context/sso-context.tsx

@@ -56,10 +56,7 @@ export function SSOProvider({ children }: SSOProviderProps) {
       if (!subscriptions[providerId].linked) {
         return Promise.resolve()
       }
-      const body = {
-        link: false,
-        providerId,
-      }
+      const body = { providerId }
 
       return postJSON('/user/oauth-unlink', { body, signal }).then(() => {
         if (isMounted.current) {