Removing external/npm package in favor of external/goerli package

We hardcode external goerli addresses from version @keep-network/keep-core@1.8.1-goerli.0
and get rid of other unused artifacts. This change is done because
prepare-dependencies.sh script was removed.

Author: dimpar

.gitignore

@@ -7,8 +7,7 @@ deployments/*
 export/
 export.json
 
-external/npm/*
-!external/npm/@keep-network/
+external/npm
 
 typechain/