stargate: Fix lint errors

packages/proto-signing/src/directsecp256k1wallet.spec.ts

@@ -1,7 +1,6 @@
 import { Secp256k1, Secp256k1Signature, sha256 } from "@cosmjs/crypto";
 import { fromBase64, fromHex } from "@cosmjs/encoding";
 import { coins } from "@cosmjs/launchpad";
-import Long from "long";
 
 import { DirectSecp256k1Wallet } from "./directsecp256k1wallet";
 import { makeAuthInfoBytes, makeSignBytes, makeSignDoc } from "./signing";

packages/proto-signing/src/signing.spec.ts

@@ -1,6 +1,5 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { fromBase64, fromHex, toHex } from "@cosmjs/encoding";
-import Long from "long";
 
 import { cosmos, google } from "./codec";
 import { DirectSecp256k1Wallet } from "./directsecp256k1wallet";

packages/stargate/src/stargateclient.spec.ts

@@ -4,7 +4,6 @@ import {
   DirectSecp256k1Wallet,
   encodePubkey,
   makeAuthInfoBytes,
-  makeSignBytes,
   makeSignDoc,
   Registry,
 } from "@cosmjs/proto-signing";