Remove css.types.color.rgba from BCD

[queengooborg]

This PR removes the rgba member of the color CSS value type from BCD. Per the data guidelines, this feature can be considered irrelevant and may be removed from BCD accordingly. Even if the current data suggests that the feature is supported, lack of support has been confirmed by the mdn-bcd-collector project (v10.7.2).

Tests Used: https://mdn-bcd-collector.gooborg.com/tests/css/types/color/rgba

Additional Notes: The MDN page has already been deleted and redirects to the rgb() page.

[Elchi3]

Thanks, sounds good to me.
The content PR/discussion happened in mdn/content#23387

[romainmenke]

We depend on this data and some of it is very recent.
Can this be reverted?

Same for hsla.

[romainmenke]

I am also unsure how this feature is irrelevant?
It was implemented and is still present today in all browsers.

Vendors are even still adding new sub features for rgba and hsla, like support for mixing numbers and percentages.

[queengooborg]

Ah, for some odd reason it looks like my custom removal reason wasn't added (I use a script to create these PRs easily). I'm not removing the feature data because it's irrelevant, but rather because it's a duplicate of the data for rgb().

[romainmenke]

@queengooborg Thank you for clarifying.
Makes total sense to remove these if they are always duplicates.
I will make the needed changes on our end.