remove obsolete license (#2696)

Ryan X. Charles · web-flow · commit 6aa3c2f304d2 · 2019-04-30T13:31:28.000-07:00
nothing is MIT licensed. everything is BSV licensed.
diff --git a/README.md b/README.md
@@ -70,9 +70,3 @@ client.isValidSignature (aMessage, aSignature, 'someone@moneybutton.com').then(
   }
 })
 ```
-
-
-
-## License
-
-MIT © 2018 Yours Inc.
