Delete nftx EA

[dskloetc]

Description

We have many EAs which are not referenced from RDD at all and are also not referenced by other EAs.

Some of these might still be used in other ways, as discussed here.

But @thomjg confirmed that nftx is one of the EAs that is not used anywhere.

Changes

As separate commits:

1. git rm -r packages/sources/nftx
2. git grep -liE nftx and made manual changes in some of those files.
3. yarn

Steps to Test

N/A

Quality Assurance

• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file or update the soak testing blacklist.
• If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• This is related to a maximum of one Jira story or GitHub issue.
• Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.

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Latest commit: 35f9b17

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