Don't use UI stuff from Salesforce

[menewman]

2fd/graphdoc#49

[menewman]

Actually seems like the dependency in question, @salesforce-ux/design-system, doesn't require BSD:
https://github.com/salesforce-ux/design-system/blob/master/LICENSE.txt

Copyright (c) 2015-present, Salesforce.com, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the Salesforce.com nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.

That seems okay, so maybe this isn't such a big deal.