Remove qiskit.quantum_info.synthesis for Qiskit 1.0 release

qiskit/quantum_info/__init__.py

@@ -156,26 +156,3 @@
     negativity,
 )
 from .quaternion import Quaternion
-
-_DEPRECATED_NAMES = {
-    "OneQubitEulerDecomposer": "qiskit.synthesis",
-    "TwoQubitBasisDecomposer": "qiskit.synthesis",
-    "XXDecomposer": "qiskit.synthesis",
-    "two_qubit_cnot_decompose": "qiskit.synthesis",
-}
-
-
-def __getattr__(name):
-    if name in _DEPRECATED_NAMES:
-        import importlib
-        import warnings
-
-        module_name = _DEPRECATED_NAMES[name]
-        warnings.warn(
-            f"Accessing '{name}' from '{__name__}' is deprecated since Qiskit 0.46"
-            f" and will be removed in 1.0.  Import from '{module_name}' instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return getattr(importlib.import_module(module_name), name)
-    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")

releasenotes/notes/remove_qinfo_synthesis-1917c7ccfcc62180.yaml

@@ -0,0 +1,13 @@
+---
+upgrade:
+  - |
+    Removed the ``qiskit.quantum_info.synthesis`` module, which has been deprecated since the 0.46 release.
+    The following objects have been moved to :mod:`qiskit.synthesis`:
+
+    * :class:`~.OneQubitEulerDecomposer` has been moved to :mod:`qiskit.synthesis.one_qubit`
+    * :class:`~.TwoQubitBasisDecomposer` has been moved to :mod:`qiskit.synthesis.two_qubits`
+    * :class:`~.XXDecomposer` has been moved to :mod:`qiskit.synthesis.two_qubits`
+    * :func:`~.two_qubit_cnot_decompose` has been moved to :mod:`qiskit.synthesis.two_qubits`
+
+    This function was removed, since it has already been deprecated in the 0.46 release:
+    * ``cnot_rxx_decompose``

test/python/synthesis/test_synthesis.py

@@ -78,7 +78,6 @@
 
 from qiskit.synthesis.unitary import qsd
 from qiskit.test import QiskitTestCase
-from qiskit.quantum_info.synthesis.ion_decompose import cnot_rxx_decompose
 
 
 def make_oneq_cliffords():
@@ -630,14 +629,6 @@ def test_float_input_angles(self):
         self.assertAlmostEqual(phi, expected_phi)
         self.assertAlmostEqual(lam, expected_lam)
 
-    def test_deprecation(self):
-        """Assert that importing this class from quantum_info raises a deprecation warning."""
-        # pylint: disable = no-name-in-module
-        with self.assertWarns(DeprecationWarning):
-            from qiskit.quantum_info import OneQubitEulerDecomposer as old_OneQubitEulerDecomposer
-
-            _ = old_OneQubitEulerDecomposer(basis="PSX")
-
 
 # FIXME: streamline the set of test cases
 class TestTwoQubitWeylDecomposition(CheckDecompositions):
@@ -988,21 +979,6 @@ def test_weyl_specialize_general(self, aaa=0.456, bbb=0.345, ccc=0.123):
 class TestTwoQubitDecompose(CheckDecompositions):
     """Test TwoQubitBasisDecomposer() for exact/approx decompositions"""
 
-    def test_cnot_rxx_decompose(self):
-        """Verify CNOT decomposition into RXX gate is correct"""
-        cnot = Operator(CXGate())
-        # Assert that this class raises a deprecation warning
-        with self.assertWarns(DeprecationWarning):
-            decomps = [
-                cnot_rxx_decompose(),
-                cnot_rxx_decompose(plus_ry=True, plus_rxx=True),
-                cnot_rxx_decompose(plus_ry=True, plus_rxx=False),
-                cnot_rxx_decompose(plus_ry=False, plus_rxx=True),
-                cnot_rxx_decompose(plus_ry=False, plus_rxx=False),
-            ]
-            for decomp in decomps:
-                self.assertTrue(cnot.equiv(decomp))
-
     @combine(seed=range(10), name="test_exact_two_qubit_cnot_decompose_random_{seed}")
     def test_exact_two_qubit_cnot_decompose_random(self, seed):
         """Verify exact CNOT decomposition for random Haar 4x4 unitary (seed={seed})."""
@@ -1253,20 +1229,6 @@ def test_euler_basis_selection(self, euler_bases, kak_gates, seed):
             requested_basis = set(oneq_gates + [kak_gate_name])
             self.assertTrue(decomposition_basis.issubset(requested_basis))
 
-    def test_deprecation(self):
-        """Assert that importing these classes from quantum_info raises a deprecation warning."""
-        # pylint: disable = no-name-in-module
-        with self.assertWarns(DeprecationWarning):
-            unitary = random_unitary(4, seed=1234)
-            from qiskit.quantum_info import TwoQubitBasisDecomposer as old_TwoQubitBasisDecomposer
-
-            _ = old_TwoQubitBasisDecomposer(unitary)
-
-        with self.assertWarns(DeprecationWarning):
-            from qiskit.quantum_info import two_qubit_cnot_decompose as old_two_qubit_cnot_decompose
-
-            _ = old_two_qubit_cnot_decompose(unitary)
-
 
 @ddt
 class TestPulseOptimalDecompose(CheckDecompositions):

test/python/synthesis/xx_decompose/test_decomposer.py

@@ -155,11 +155,3 @@ def test_no_error_on_empty_basis_fidelity_trivial_target(self):
         mat = Operator(qc).to_matrix()
         dqc = decomposer(mat)
         self.assertTrue(np.allclose(mat, Operator(dqc).to_matrix()))
-
-    def test_deprecation(self):
-        """Assert that importing this class from quantum_info raises a deprecation warning."""
-        # pylint: disable = no-name-in-module
-        with self.assertWarns(DeprecationWarning):
-            from qiskit.quantum_info import XXDecomposer as old_XXDecomposer
-
-            _ = old_XXDecomposer(euler_basis="PSX")