Why was the 'sparse_actions' function from POMCP.jl removed in BasicPOMCP.jl?

@zsunberg While looking at ways to reduce the size of the action space in my model during computation, I came across the `POMCP.sparse_actions` function in the [documentation](https://juliapomdp.github.io/POMCP.jl/latest/methods/) of POMDPs.jl, which I understand has been deprecated.
I was wondering if there was some rationale behind not providing this function in BasicPOMCP.jl, and if there is another way to sample a subset of actions to be considered at the current node during planning.