Update license information in documentation
@@ -69,8 +69,6 @@ For more information on Philadelphia:
## License
-Copyright 2015 Jussi Virtanen and [contributors][].
-
- [contributors]: https://github.com/paritytrading/philadelphia/graphs/contributors
+Copyright 2015 Philadelphia authors.
Released under the Apache License, Version 2.0. See `LICENSE.txt` for details.
