Remove getPermissions to fix redirect loop (#516)

src/synapse/authProvider.ts

@@ -189,9 +189,7 @@ const authProvider: AuthProvider = {
   checkAuth: () => {
     const access_token = localStorage.getItem("access_token");
     return typeof access_token === "string" ? Promise.resolve() : Promise.reject();
-  },
-  // called when the user navigates to a new location, to check for permissions / roles
-  getPermissions: () => Promise.resolve(),
+  }
 };
 
 export default authProvider;