Call none

[kaspernielsen96]

Context:
Adding a method where one can call the ansatz with None for some arguments. This will return a an updated ansatz with on fewer variables (wires).
Description of the Change:
Adding a method to the DiffOpPolyExpAnsatz where one can evaluate only some of the wires, and thus returning a new updated ansatz.
Benefits:
Allows for reduction in the size of the ansatz. Can also be used with BtoQ to do a Homodyne measurement.

[ziofil]

👍