Remove all deprecated code

[woodsp-ibm]

For next release and preparation to be supported by community removed all deprecated code

• Remove all deprecated code
• Remove depecation.py and its test (going forwards the intent is to only use Qiskit decorators)
• With the above removed migration notebooks will not run/build. Convert to .rst format so the content is kept but they are no longer run as has been done in other app repos.

Depending on timing we may choose to add a reno that describes this change, and others, later so as to be consistent with what is said for the other apps etc.

I'll comment here since its about removing stuff. Maybe check over the release notes that come out that are new and make sure no notes that have not yet gone out in any release are being obsoleted by these changes - if so remove/change them as needed.

• After above switch any remaining uses of QuantumCircuit bind_parameters over to assign_parameters as the former is now deprecated in Qiskit main (0.45)