remove deprecated

lib/accounts.js

@@ -103,7 +103,7 @@ function getAccount(accountId, args, handlers) {
       return createAccount(args, handlers);
     }
 
-    return leCrypto.parseAccountPrivateKeyAsync(files.private_key).then(function (keypair) {
+    return leCrypto.privateJwkToPemsAsync(files.private_key).then(function (keypair) {
       files.accountId = accountId;                  // preserve current account id
       files.publicKeySha256 = keypair.publicKeySha256;
       files.publicKeyMd5 = keypair.publicKeyMd5;