Consistency in Licenses / README across Repos (#155)

* Rename LICENSE-Apache to LICENSE

* Delete LICENSE-MIT

* Update README.md

README.md

@@ -87,17 +87,14 @@ To see computations used in the background, go to the `math/` directory.
 From there, you can run the `.sage` files in a SageMath environment.
 In particular, the `math/field.sage` computes roots of unity in the `PlutoField` which is of size 101. To install sage on your machine, follow the instructions [here](https://doc.sagemath.org/html/en/installation/index.html). If you are on a Mac, you can install it via homebrew with `brew install --cask sage`.
 
+## License
+
+Licensed under the Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+
 ## Contributing
 
 We welcome contributions to our open-source projects. If you want to contribute or follow along with contributor discussions, join our [main Telegram channel](https://t.me/pluto_xyz/1) to chat about Pluto's development.
 
 Our contributor guidelines can be found in [CONTRIBUTING.md](./CONTRIBUTING.md). A good starting point is issues labelled 'bounty' in our repositories.
 
-Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
-
-## License
-
-Licensed under your option of either:
-
-- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
-- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.