Delete references to the removed QubitStateVector class

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 ### Breaking changes 💔
 
+* The ``qml.QubitStateVector`` template has been removed. Instead, use :class:`~pennylane.StatePrep`.
+
 ### Deprecations 👋
 
 ### Documentation 📝
@@ -16,6 +18,8 @@
 
 This release contains contributions from (in alphabetical order):
 
+Andrija Paurevic
+
 ---
 # Release 0.39.0
 

doc/conf.py

@@ -293,7 +293,6 @@
         "of Google Inc."
     ],
     "toc_overview": True,
-    "navbar_active_link": 3,
     "google_analytics_tracking_id": "G-C480Z9JL0D"
 }
 

pennylane_qiskit/converter.py

@@ -61,7 +61,6 @@
     "CRY": lib.CRYGate,
     "CRZ": lib.CRZGate,
     "PhaseShift": lib.PhaseGate,
-    "QubitStateVector": lib.Initialize,
     "StatePrep": lib.Initialize,
     "Toffoli": lib.CCXGate,
     "QubitUnitary": lib.UnitaryGate,
@@ -527,7 +526,7 @@ def _function(*args, params: dict = None, wires: list = None, **kwargs):
             elif instruction_name in inv_map:
                 operation_class = getattr(pennylane_ops, inv_map[instruction_name])
                 operation_args.extend(operation_params)
-                if operation_class in (qml.QubitStateVector, qml.StatePrep):
+                if operation_class is qml.StatePrep:
                     operation_args = [np.array(operation_params)]
 
             elif isinstance(instruction, Measure):
@@ -747,7 +746,7 @@ def operation_to_qiskit(operation, reg, creg=None):
 
     # Need to revert the order of the quantum registers used in
     # Qiskit such that it matches the PennyLane ordering
-    if operation in ("QubitUnitary", "QubitStateVector", "StatePrep"):
+    if operation in ("QubitUnitary", "StatePrep"):
         qregs = list(reversed(qregs))
 
     if creg:

pennylane_qiskit/qiskit_device_legacy.py

@@ -301,7 +301,7 @@ def apply_operations(self, operations):
 
             qregs = [self._reg[i] for i in device_wires.labels]
 
-            if operation in ("QubitUnitary", "QubitStateVector", "StatePrep"):
+            if operation in ("QubitUnitary", "StatePrep"):
                 # Need to revert the order of the quantum registers used in
                 # Qiskit such that it matches the PennyLane ordering
                 qregs = list(reversed(qregs))
@@ -327,9 +327,9 @@ def qubit_state_vector_check(self, operation):
             operation (pennylane.Operation): operation to be checked
 
         Raises:
-            DeviceError: If the operation is QubitStateVector or StatePrep
+            DeviceError: If the operation is StatePrep
         """
-        if operation in ("QubitStateVector", "StatePrep"):
+        if operation == "StatePrep":
             if self._is_unitary_backend:
                 raise DeviceError(
                     f"The {operation} operation "