allow removal of mixed-in components (removeAttribute) #3275
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Description:
Found out I wasn't able to remove a mixed-in component.
I had
<a-mixin id="foo" raycastable>to start entities off with raycastable-ness. But later, I would toggle them, but it didn't take. Seems there was 2-year old logic to not allow removal of mixed-in components, which doesn't make sense anymore.Changes proposed:
removeComponentversus the weirdsetEntityAttribute(attr, undefined, null).