perf(custody-keyring): remove migrations from index (#774)

.gitignore

@@ -386,3 +386,5 @@ test-report.xml
 **/junit.xml
 # Test results
 test-results/
+
+.nx/

packages/custodyKeyring/src/index.ts

@@ -6,7 +6,3 @@ export { MmiConfigurationController } from "./MmiConfiguration";
 
 export { IMmiConfigurationControllerOptions } from "./interfaces/IMmiConfigurationControllerOptions";
 export { JsonRpcCustodyKeyring } from "./custodianTypes/json-rpc/JsonRpcCustodyKeyring";
-
-// @TODO Check if we need to export here the Migrator or it will live in it's own package
-export { Migrator } from "./migrations/migrator";
-export { migrations } from "./migrations";