Qiskit / qiskit / 15330118071

88%

Build Type

push

github

Committed by web-flow

Commit Message

Remove unexecutable code path in InstructionDurations (#14275)

* Remove unexecutable code path in InstructionDurations

With the removal of BackendV1 in Qiskit 2.0 there was a code path in the
`InstructionDurations` class's `.from_duration()` constructor method
that still was handling the case of backend input not being `BackendV2`.
Right now in Qiskit the only valid `Backend` subclass is `BackendV2` so
this other code path is never executable. This commit simplifies this
method so that only the BackendV2 code path exists. However, the
signature is not changed for backwards compatibility, which is something
we'll need to manage if/when a BackendV3 is added.

* Add missing raises documentation

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