Remove outdated matplotlib rcParams setting
Description
The legacy_colorbar setting has no effect in matplotlib 3.4+ - except that it gives a warning saying it's going to be removed. We now deploy offline calibration with matplotlib 3.4.2, so we can remove this line.
How Has This Been Tested?
I haven't tested; I'm trusting matplotlib's docs.
Types of changes
- Bug fix (non-breaking change which fixes an issue)
Checklist:
- My code follows the code style of this project.