Remove explicit newrelic configuration

[JoeyBG]

📖 Description

This is the default behaviour of the agent, no need to explicitly load those variables!

🦀 Dispatch

• #dispatch/elixir

[mirego-builds]

🦀 Requesting reviewers for this pull request:

• @garno (contributor with 0 commits in the last 90 days and 12 commits overall)
• @charlesdemers (reviewer for the elixir stack)

[remi]

I’m wondering if it’s a good thing to be explicit instead of implicit here 🤔

[JoeyBG]

I’m wondering if it’s a good thing to be explicit instead of implicit here 🤔

I wasn't sure either. The variable is still documented in .env.dev (and in the official documentation)