fix: Remove Go package from current repo

[lym953]

What does this PR do?

Delete the generated Go package from the current repo.

Motivation

The package is supposed to be in datadog-cdk-constructs-go repo.

I'm not sure how the package was added here in 27d2ac7. Maybe I ran the publish command npx -p publib@latest publib-golang with the wrong (stale) configuration, i.e. when the moduleName in .projenrc.js was still pointing at the current repo (datadog-cdk-constructs) instead of the new repo (datadog-cdk-constructs-go). Below's the correct config:

  publishToGo: {
    moduleName: "github.com/DataDog/datadog-cdk-constructs-go",
    packageName: "ddcdkconstruct",
  },

https://github.com/DataDog/datadog-cdk-constructs/blob/main/.projenrc.js#L23-L26

Testing Guidelines

N/A. This PR should be safe because it just deletes unused code.

After this PR is merged, I'll try to publish the Go package again. Hopefully that will only update datadog-cdk-constructs-go repo instead of the current datadog-cdk-constructs repo.

Additional Notes

Types of Changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
• This PR collects user input/sensitive content into Datadog

[lym953]

/merge

[dd-devflow]

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