Extend deprecation of QuantumCircuit.duration and DAGCircuit.duration

Since we're unlikely to be able to include these removals as part of
Qiskit 2.0.0 given the dependencies on them and that the removals are
not critical for any work we have in the 2.x series this commit opts to
just update the deprecation message to say the removal will occur in
Qiskit 3.0.0 not 2.0.0 like was originally planned.

crates/circuit/src/dag_circuit.rs

@@ -397,15 +397,15 @@ impl DAGCircuit {
     /// The total duration of the circuit, set by a scheduling transpiler pass. Its unit is
     /// specified by :attr:`.unit`
     ///
-    /// DEPRECATED since Qiskit 1.3.0 and will be removed in Qiskit 2.0.0
+    /// DEPRECATED since Qiskit 1.3.0 and will be removed in Qiskit 3.0.0
     #[getter]
     fn get_duration(&self, py: Python) -> PyResult<Option<Py<PyAny>>> {
         imports::WARNINGS_WARN.get_bound(py).call1((
             intern!(
                 py,
                 concat!(
                     "The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.duration`` is ",
-                    "deprecated as of Qiskit 1.3.0. It will be removed in Qiskit 2.0.0.",
+                    "deprecated as of Qiskit 1.3.0. It will be removed in Qiskit 3.0.0.",
                 )
             ),
             py.get_type::<PyDeprecationWarning>(),
@@ -416,15 +416,15 @@ impl DAGCircuit {
 
     /// The unit that duration is specified in.
     ///
-    /// DEPRECATED since Qiskit 1.3.0 and will be removed in Qiskit 2.0.0
+    /// DEPRECATED since Qiskit 1.3.0 and will be removed in Qiskit 3.0.0
     #[getter]
     fn get_unit(&self, py: Python) -> PyResult<String> {
         imports::WARNINGS_WARN.get_bound(py).call1((
             intern!(
                 py,
                 concat!(
                     "The property ``qiskit.dagcircuit.dagcircuit.DAGCircuit.unit`` is ",
-                    "deprecated as of Qiskit 1.3.0. It will be removed in Qiskit 2.0.0.",
+                    "deprecated as of Qiskit 1.3.0. It will be removed in Qiskit 3.0.0.",
                 )
             ),
             py.get_type::<PyDeprecationWarning>(),

qiskit/circuit/quantumcircuit.py

@@ -1113,7 +1113,7 @@ def __init__(
         transpiler and reattach it to the output, so you can track your own metadata."""
 
     @property
-    @deprecate_func(since="1.3.0", removal_timeline="in Qiskit 2.0.0", is_property=True)
+    @deprecate_func(since="1.3.0", removal_timeline="in Qiskit 3.0.0", is_property=True)
     def duration(self):
         """The total duration of the circuit, set by a scheduling transpiler pass.  Its unit is
         specified by :attr:`unit`."""
@@ -1124,7 +1124,7 @@ def duration(self, value: int | float | None):
         self._duration = value
 
     @property
-    @deprecate_func(since="1.3.0", removal_timeline="in Qiskit 2.0.0", is_property=True)
+    @deprecate_func(since="1.3.0", removal_timeline="in Qiskit 3.0.0", is_property=True)
     def unit(self):
         """The unit that :attr:`duration` is specified in."""
         return self._unit

releasenotes/notes/extend-deprecation-duration-0221fcc9887ced0d.yaml

@@ -0,0 +1,15 @@
+---
+deprecations_circuits:
+  - |
+    The deprecated :attr:`.QuantumCircuit.duration` attribute was not removed
+    in this release as originally planned, it will be removed as part of the
+    Qiskit 3.0.0 release instead. This functionality has been superseded
+    by the :meth:`.QuantumCircuit.estimate_duration` method which should be used
+    instead.
+deprecations_transpiler:
+  - |
+    The deprecated :attr:`.DAGCircuit.duration` attribute was not removed
+    in this release as originally planned, it will be removed as part of the
+    Qiskit 3.0.0 release instead. This functionality has been superseded
+    by the :meth:`.QuantumCircuit.estimate_duration` method which should be used
+    instead.