ethereum: remove unused Schnorr references from tests

ethereum/migrations/1_initial_migration.js

@@ -1,11 +1,8 @@
-const Schnorr = artifacts.require("Schnorr");
 const WrappedAsset = artifacts.require("WrappedAsset");
 const Wormhole = artifacts.require("Wormhole");
 
 module.exports = async function (deployer) {
-    await deployer.deploy(Schnorr);
     await deployer.deploy(WrappedAsset);
-    await deployer.link(Schnorr, Wormhole);
     await deployer.deploy(Wormhole, {
         keys: ["0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf"],
         expiration_time: 0

ethereum/test/wormhole.js

@@ -1,4 +1,3 @@
-const Schnorr = artifacts.require("Schnorr");
 const Wormhole = artifacts.require("Wormhole");
 const WrappedAsset = artifacts.require("WrappedAsset");
 const ERC20 = artifacts.require("ERC20PresetMinterPauser");