Remove noise from scene console

[nearnshaw]

Whenever you open the browser console to a scene, it's covered in messages that are irrelevant to you as a scene creator.

Many of these are warnings or even errors, which can be very misleading. People in Discord often ask about these whenever they run into a completely unrelated problem, making them waste a lot of time going down a false path.

ALL information in the console when running dcl start should be relevant to the scope of creating a scene. Anything else is noise.

If you just set up a default scene and open the console you'll see a lot. Here's what I see in an empty scene, the scene has essentially nothing, I think just a cube. And it's already producing all of this literature:

These entire four pages are all noise. Out of all that, the only bits that have some minor justification to be there are the following:

Everything else is noise.

Some of these irrelevant messages only seem to appear in larger scenes. Here are some more specific examples I fished from running Genesis Plaza locally:

https://github.com/decentraland-scenes/Genesis-Plaza