Remove ConfigurableFakeBackend (Qiskit#11568)

* Remove ``ConfigurableFakeBackend`` * remove unused imports
ShellyGarion · Jan 18, 2024 · 274063c · 274063c
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diff --git a/qiskit/providers/fake_provider/__init__.py b/qiskit/providers/fake_provider/__init__.py
@@ -210,7 +210,6 @@
     FakeBackendV2
     FakeBackend5QV2
     FakeMumbaiFractionalCX
-    ConfigurableFakeBackend
 
 Fake Backend Base Classes
 =========================
@@ -249,6 +248,3 @@
 from .fake_1q import Fake1Q
 from .fake_backend_v2 import FakeBackendV2, FakeBackend5QV2
 from .fake_mumbai_v2 import FakeMumbaiFractionalCX
-
-# Configurable fake backend
-from .utils.configurable_backend import ConfigurableFakeBackend
diff --git a/qiskit/providers/fake_provider/utils/configurable_backend.py b/qiskit/providers/fake_provider/utils/configurable_backend.py
diff --git a/releasenotes/notes/remove-configfake-c009f3d28b4fa12b.yaml b/releasenotes/notes/remove-configfake-c009f3d28b4fa12b.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Removed the ``ConfigurableFakeBackend`` class deprecated in
+    Qiskit 0.46.0. Instead, a suitable :class:`.FakeBackend` can be used.