remove unneeded dependency for kerberos js module

[5amu]

It's not really a feature, but it's a dependency issue for the kerberos js module: at the moment, the module github.com/ropnop/gokrb5 is used to handle functionalities concerning Kerberos.

The README.md of that repo states:

I had to export some functions in order to get my tool kerbrute to work, so I forked the package. You don't want to use this probably.

But new and updated features are missing from the upstream (jcmturner's gokrb5). In the PR that will reference this issue I found a way to export the function needed by kerbrute without using a fork of the module.

[olearycrew]

@Mzack9999 can you take a look at this issue and associated PR?