Update README.md

Author: danmrichards

README.md

@@ -9,7 +9,6 @@ The emulator uses the following packages which have requirements of their own
 before we can build with them. Follow the instructions for each:
 
 * [Pixel][2]
-* [Oto][3]
 
 Clone this repo and build the binary:
 ```bash
@@ -54,7 +53,6 @@ As this was a learning exercise I had to seek a lot of help from the interwebs:
 
 [1]: https://en.wikipedia.org/wiki/CHIP-8
 [2]: https://github.com/faiface/pixel#requirements
-[3]: https://github.com/hajimehoshi/oto#prerequisite
-[4]: https://medium.com/average-coder/exploring-emulation-in-go-chip-8-636f99683f2a
-[5]: http://www.multigesture.net/articles/how-to-write-an-emulator-chip-8-interpreter
-[6]: https://en.wikipedia.org/wiki/CHIP-8#Virtual_machine_description
+[3]: https://medium.com/average-coder/exploring-emulation-in-go-chip-8-636f99683f2a
+[4]: http://www.multigesture.net/articles/how-to-write-an-emulator-chip-8-interpreter
+[5]: https://en.wikipedia.org/wiki/CHIP-8#Virtual_machine_description