remove cloud simulator doc pages

[abbycross]

Closes #1424 and #607

[qiskit-bot]

One or more of the following people are relevant to this code:

• @abbycross
• @beckykd

[abbycross]

@beckykd could you please remove the example with the qasm simulator on these migration guide pages?:

https://docs.quantum.ibm.com/api/migration-guides/qiskit-runtime-examples
https://docs.quantum.ibm.com/api/migration-guides/qiskit-algorithms-module

you can use this branch if it makes it easier!

[Eric-Arellano]

Do we know what the 404 plan is? Redirect to something like a product announcement? Please be careful to merge this until we have that figured out because the next time we do an open source sync would cause 404s.

[beckykd]

@beckykd could you please remove the example with the qasm simulator on these migration guide pages?:

https://docs.quantum.ibm.com/api/migration-guides/qiskit-runtime-examples https://docs.quantum.ibm.com/api/migration-guides/qiskit-algorithms-module

you can use this branch if it makes it easier!

I found another one in https://docs.quantum.ibm.com/build/operators-overview -- can we just change that to a different backend? Maybe @kaelynj knows.

[beckykd]

@beckykd could you please remove the example with the qasm simulator on these migration guide pages?:

https://docs.quantum.ibm.com/api/migration-guides/qiskit-runtime-examples https://docs.quantum.ibm.com/api/migration-guides/qiskit-algorithms-module

you can use this branch if it makes it easier!

qiskit-runtime-examples: all uses are in the legacy/backend.run() tabs, so I think they're OK.

qiskit-algorithms-module is more tricky. It's part of the Qiskit.44 changes -- so none of it is updated to use V2 primitives and the code won't work anymore anyway. Do we still need the Qiskit .44 migration guides? As a stopgap, I did update the "updated" example in the VQD Example section to run on a real backend but left the Legacy example running on qasm_simulator. Still, it's not going to run without deprecation warnings; and in a month or so (?) it won't work at all.