Remove setting of user-dependent FXAA vedo setting

[alessandrofelder]

Description

What is this PR

• [x] Bug fix
• [ ] Addition of a new feature
• [ ] Other

Why is this PR needed? Brainrender examples don't render correctly on some machines - see #240 and related forum discussion

What does this PR do? Removes the explicit setting of a vedo setting that messes with rendering.

References

Closes #240

How has this PR been tested?

Local running of

import brainrender
scene=brainrender.Scene(atlas_name="allen_mouse_25um")
scene.render()

Is this a breaking change?

Yes, if anyone was relying on use_FXAA being set to true.

Does this PR require an update to the documentation?

Don't think this was documented anywhere in the first place, so not specifically?

Checklist:

• [x] The code has been tested locally (manually)
• [ ] Tests have been added to cover all new functionality (unit & integration)
• [ ] The documentation has been updated to reflect any changes
• [x] The code has been formatted with pre-commit

[adamltyson]

Would it not be better to just change the default so that users can change this within brainrender settings?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (69a2aea) 86.39% compared to head (b304bc2) 86.39%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## mega-fix #283 +/- ## ========================================= Coverage 86.39% 86.39% ========================================= Files 26 26 Lines 1205 1205 ========================================= Hits 1041 1041 Misses 164 164 ```

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[alessandrofelder]

Would it not be better to just change the default so that users can change this within brainrender settings?

Sure, makes it more explicit what we expect users might want to change (think they can change everything anyway though, if they know what settings vedo has).