dillon1000/react

Don't stop context traversal at matching consumers (#13391)

* Don't stop context traversal at matching consumers

Originally, the idea was to time slice the traversal. This worked when
there was only a single context type per consumer.

Now that each fiber may have a list of context dependencies, including
duplicate entries, that optimization no longer makes sense – we could
end up scanning the same subtree multiple times.

* Remove changedBits from context object and stack

Don't need it anymore, yay