[VANotify] Remove va_notify_metadata_statsd_tags flipper toggle

[coope93]

Summary

• This work is behind a feature toggle (flipper): NO
• Deleting the va_notify_metadata_statsd_tags toggle from the features file. The logic that uses it will be removed before merging this.
• I will delete the toggle from the environment databases per the platform docs as part of this work
• 1010 Health Apps

Related issue(s)

• The logic where we use it was removed in this PR that will be merged first

Testing done

• New code is covered by unit tests
• Describe what the old behavior was prior to the change
• Describe the steps required to verify your changes are working as expected. Exclusively stating 'Specs run' is NOT acceptable as appropriate testing
• If this work is behind a flipper:
  • Tests need to be written for both the flipper on and flipper off scenarios. Docs.
  • What is the testing plan for rolling out the feature?

Screenshots

Note: Optional

What areas of the site does it impact?

(Describe what parts of the site are impacted andifcode touched other areas)

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

[github-actions]

Error: A file (or its parent directories) was deleted but its reference still exists in CODEOWNERS. Please update the .github/CODEOWNERS file and delete the entry for the Offending file:

[github-actions]

Error: A file (or its parent directories) does not have a CODEOWNERS entry. Please update the .github/CODEOWNERS file and add the entry for the Offending file: