Use internal FakeProvider in place of one removed in Qiskit 1.0

Author: wshanks

qiskit_experiments/test/fake_backend.py

@@ -13,8 +13,8 @@
 """Fake backend class for tests."""
 import uuid
 from qiskit.circuit.library import Measure
+from qiskit.providers import ProviderV1
 from qiskit.providers.backend import BackendV2
-from qiskit.providers.fake_provider import FakeProvider
 from qiskit.providers.options import Options
 from qiskit.transpiler import Target
 
@@ -23,6 +23,12 @@
 from qiskit_experiments.test.utils import FakeJob
 
 
+class FakeProvider(ProviderV1):
+    def backends(self, name=None, **kwargs):
+        """List of available backends. Empty in this case"""
+        return []
+
+
 class FakeBackend(BackendV2):
     """
     Fake backend for test purposes only.