Remove mapbox specifics and branding from .github

[marcelnormann]

Just text editing, did not touch .workflow to avoid breaking things too soon.

[github-actions]

Bundle size report:

Size Change: 0 B
Total Size Before: 201 kB
Total Size After: 201 kB

Output file	Before	After	Change
mapbox-gl.js	196 kB	196 kB	0 B
mapbox-gl.css	4.62 kB	4.62 kB	0 B

ℹ️ View Details

No major changes

[nyurik]

looks good! Just a tiny nit -- would be better to use your personal fork to create PRs -- would keep the primary repo clean from dev branches (unless it's a new direction of the whole project relevant to everyone, etc).

P.S. Feel free to merge

[nyurik]

Merged - benign change that also fixes a minor annoyance with the line endings.