Remove 6th milestone

[xgreenx]

Project Abstract

The mission of this project is to make ink! usable and facilitate WASM ecosystem adoption.

To be successful with this mission, we have outlined several steps that would need to be taken.

1. OpenBrush is a library for secure smart contract development on ink!, same as
   OpenZeppelin on Ethereum.
2. OpenBrush should serve as a starting point for every developer entering a Polkadot(ink!) ecosystem.
3. In addition to having a standard implementation, Openbrush should also have macroses to simplify and abstract up applications(smart contracts) development.
4. For Openbrush to fulfill its purpose, several changes must be made & several blockers to be overcome in ink!. We are committed to doing that in the context of this project.

It is an application for a follow-up grant. The initial grant covered the first and second milestones:

• Openbrush Milestone 1 delivery report
• Openbrush Milestone 2 delivery report

This grant aims to cover milestones 3-5.

For which grant level are you applying?

• Level 1: Up to $10,000, 2 approvals
• Level 2: Up to $50,000, 3 approvals
• Level 3: Unlimited, 5 approvals (for > $100k Web3 Foundation Council approval)

Application Checklist

• The application template has been copied, renamed ( project_name.md) and updated.
• A BTC or Ethereum (DAI/USDT) address for the payment of the milestones is provided inside the application.
• I have read and acknowledged the terms and conditions.
• The software delivered for this grant will be released under an open-source license specified in the application.
• The initial PR contains only one commit (squash and force-push if needed).
• The grant will only be announced once the first milestone has been accepted.