Fix session issues

Close #809

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/types/apollo.ts

@@ -1,10 +0,0 @@
-import { ServerParseError } from "@apollo/client/link/http";
-import { ServerError } from "@apollo/client/link/utils";
-
-function isServerError(
-  err: Error | ServerError | ServerParseError | undefined
-): err is ServerError {
-  return !!err && (err as ServerError).statusCode !== undefined;
-}
-
-export { isServerError };