Remove missing image log

[LukasPaczos]

Closes #14581.

[tobrun]

I thought it is safe to add image ids to the layer that might not be added via style.addImage(id, image).
While it's valid to have a style declaration with missing image resources, It still shows your style setup is not correct/complete and it's something an end user should be aware of. In normal use with using Mapbox default styles, no warning is emitted.

I rather keep this log around but with a lower log level and using a constant formatted string,

[tobrun]

Let me back up my statement above with an actual use-case. I have a custom style in #14582 and the issue ends up being a missing image resource. If pattern images were integrated with missing images as now done in #14605, I would have been able to found the root cause myself instead of needing help from core.

[AlexanderEggers]

@tobrun Wouldn't it make more sense to throw a log once when the map is initialising and not every time the user is moving the camera?

[tobrun]

with #14610, let's remove the log. Will just use onStyleImageMissing as a debug tool instead.

[LukasPaczos]

Will just use onStyleImageMissing as a debug tool instead.

That was my idea. Since having no resources for particular style image can be a legitimate strategy, the callback should be the source of truth.

#14610 doesn't change the log statement targeted here, can we merge this one in this case? misinterpreted