Move make_generic_backend to provider.utils.

The reason for this is that it isn't actually part of the
fake backend _provider_. And also, fake backends are likely
going away in Qiskit.

qiskit/providers/fake_provider/__init__.py

@@ -210,7 +210,6 @@
     FakeBackendV2
     FakeBackend5QV2
     FakeMumbaiFractionalCX
-    make_generic_backend
 
 Fake Backend Base Classes
 =========================
@@ -249,4 +248,3 @@
 from .fake_1q import Fake1Q
 from .fake_backend_v2 import FakeBackendV2, FakeBackend5QV2
 from .fake_mumbai_v2 import FakeMumbaiFractionalCX
-from .fake_generic import make_generic_backend

qiskit/providers/utils/__init__.py

@@ -0,0 +1,23 @@
+# This code is part of Qiskit.
+#
+# (C) Copyright IBM 2024.
+#
+# This code is licensed under the Apache License, Version 2.0. You may
+# obtain a copy of this license in the LICENSE.txt file in the root directory
+# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+#
+# Any modifications or derivative works of this code must retain this
+# copyright notice, and modified files need to carry a notice indicating
+# that they have been altered from the originals.
+
+"""
+==============================================
+Provider Utils (:mod:`qiskit.providers.utils`)
+==============================================
+
+.. currentmodule:: qiskit.providers.utils
+
+.. autofunction:: make_generic_backend
+"""
+
+from .generic_backend import make_generic_backend

qiskit/providers/fake_provider/fake_generic.py → qiskit/providers/utils/generic_backend.py

@@ -17,7 +17,6 @@
 import numpy as np
 from numpy.random import Generator
 
-from .simulator_backend import _SimulatorBackend
 
 from qiskit.pulse.instruction_schedule_map import InstructionScheduleMap
 from qiskit.circuit import Instruction
@@ -37,6 +36,7 @@
     PulseDefaults,
     Command,
 )
+from qiskit.providers.simulator_backend import _SimulatorBackend
 from qiskit.qobj import PulseQobjInstruction, PulseLibraryItem
 
 # Noise default values/ranges for duration and error of supported

test/python/compiler/test_transpiler.py

@@ -71,12 +71,12 @@
 from qiskit.dagcircuit import DAGOpNode, DAGOutNode
 from qiskit.exceptions import QiskitError
 from qiskit.providers.backend import BackendV2
-from qiskit.providers.fake_provider import make_generic_backend
 from qiskit.providers.fake_provider import (
     FakeMelbourne,
     FakeRueschlikon,
     FakeVigo,
 )
+from qiskit.providers.utils import make_generic_backend
 from qiskit.providers.options import Options
 from qiskit.pulse import InstructionScheduleMap
 from qiskit.quantum_info import Operator, random_unitary

test/python/providers/utils/__init__.py

@@ -0,0 +1,13 @@
+# This code is part of Qiskit.
+#
+# (C) Copyright IBM 2022.
+#
+# This code is licensed under the Apache License, Version 2.0. You may
+# obtain a copy of this license in the LICENSE.txt file in the root directory
+# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
+#
+# Any modifications or derivative works of this code must retain this
+# copyright notice, and modified files need to carry a notice indicating
+# that they have been altered from the originals.
+
+"""Qiskit Provider utils tests."""

test/python/providers/fake_provider/test_fake_generic.py → test/python/providers/utils/test_generic_backend.py

@@ -10,13 +10,13 @@
 # copyright notice, and modified files need to carry a notice indicating
 # that they have been altered from the originals.
 
-"""Tests for fake_generic.py"""
+"""Tests for generic backend construction."""
 
 import math
 
 from qiskit import ClassicalRegister, QuantumCircuit, QuantumRegister
 from qiskit import transpile
-from qiskit.providers.fake_provider import make_generic_backend
+from qiskit.providers.utils import make_generic_backend
 from qiskit.transpiler import CouplingMap
 from qiskit.exceptions import QiskitError
 from qiskit.test import QiskitTestCase

test/python/pulse/test_macros.py

@@ -24,7 +24,8 @@
 )
 from qiskit.pulse import macros
 from qiskit.pulse.exceptions import PulseError
-from qiskit.providers.fake_provider import FakeOpenPulse2Q, FakeHanoi, make_generic_backend
+from qiskit.providers.fake_provider import FakeOpenPulse2Q, FakeHanoi
+from qiskit.providers.utils import make_generic_backend
 from qiskit.test import QiskitTestCase