Update the readme following the Base32 class refactor

README.md

@@ -6,10 +6,6 @@ TODO
 
 This project is licensed under [the MIT license], you can find a copy of the license in the LICENSE.txt file.
 
-### Base32 class
-
-The `Base32` class has been adapted from [Shane's answer] to the [Base32 Decoding] StackOverflow question and is licensed under the [Creative Commons BY-SA 3.0] license.
-
 ## Credits
 
 The `Otp` class has been adapted from [Nathan Adams]' [OTPNet] project and it has been re-licensed under the MIT license with permission from the author. Its full copyright chain is listed below.
@@ -24,9 +20,6 @@ The tests vectors for the HOTP implementations are taken from [RFC 4226]'s [Appe
 The tests vectors for the TOTP implementations are taken from [RFC 6238]'s [Appendix B].
 
   [the MIT license]: https://opensource.org/licenses/MIT
-  [Shane's answer]: https://stackoverflow.com/a/7135008
-  [Base32 Decoding]: https://stackoverflow.com/q/641361
-  [Creative Commons BY-SA 3.0]: https://creativecommons.org/licenses/by-sa/3.0/
   [Nathan Adams]: https://srchub.org/u/nadams/
   [OTPNet]: https://github.com/nadams810/otpnet
   [RFC 4226]: https://tools.ietf.org/html/rfc4226