Remove HOWTO and/or deffer to substrate devhub?

[nuke-web3]

https://github.com/substrate-developer-hub/substrate-pallet-template/blob/master/HOWTO.md

This document may fall out of sync with the devhub, should it be removed, or edited to strongly suggest using the following tutos?

• https://substrate.dev/docs/en/tutorials/add-a-pallet/ (basics)
• https://substrate.dev/docs/en/tutorials/create-a-pallet/ (customizations to exisitng, and new ones)
• https://substrate.dev/docs/en/tutorials/add-contracts-pallet/ (for more advanced pallet integrations in general)