Remove __qiskit_version__ (deprecated in Qiskit Terra 0.25) (#11305)

* remove __qiskit_version__

* reno

qiskit/__init__.py

@@ -80,10 +80,6 @@
 from qiskit.compiler import transpile, assemble, schedule, sequence
 
 from .version import __version__
-from .version import QiskitVersion
-
-
-__qiskit_version__ = QiskitVersion()
 
 
 class AerWrapper:

qiskit/version.py

@@ -16,9 +16,6 @@
 
 import os
 import subprocess
-from collections.abc import Mapping
-
-import warnings
 
 ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
 
@@ -85,97 +82,3 @@ def get_version_info():
 
 
 __version__ = get_version_info()
-
-
-class QiskitVersion(Mapping):
-    """DEPRECATED in 0.25.0 use qiskit.__version__"""
-
-    __slots__ = ["_version_dict", "_loaded"]
-
-    def __init__(self):
-        self._version_dict = {
-            "qiskit": __version__,
-        }
-        self._loaded = False
-
-    def _load_versions(self):
-        warnings.warn(
-            "qiskit.__qiskit_version__ is deprecated since "
-            "Qiskit Terra 0.25.0, and will be removed 3 months or more later. "
-            "Instead, you should use qiskit.__version__. The other packages listed in the"
-            "former qiskit.__qiskit_version__ have their own __version__ module level dunder, "
-            "as standard in PEP 8.",
-            category=DeprecationWarning,
-            stacklevel=3,
-        )
-        try:
-            # TODO: Update to use qiskit_aer instead when we remove the
-            # namespace redirect
-            from qiskit.providers import aer
-
-            self._version_dict["qiskit-aer"] = aer.__version__
-        except Exception:
-            self._version_dict["qiskit-aer"] = None
-        try:
-            from qiskit import ignis
-
-            self._version_dict["qiskit-ignis"] = ignis.__version__
-        except Exception:
-            self._version_dict["qiskit-ignis"] = None
-        try:
-            from qiskit.providers import ibmq
-
-            self._version_dict["qiskit-ibmq-provider"] = ibmq.__version__
-        except Exception:
-            self._version_dict["qiskit-ibmq-provider"] = None
-        try:
-            import qiskit_nature
-
-            self._version_dict["qiskit-nature"] = qiskit_nature.__version__
-        except Exception:
-            self._version_dict["qiskit-nature"] = None
-        try:
-            import qiskit_finance
-
-            self._version_dict["qiskit-finance"] = qiskit_finance.__version__
-        except Exception:
-            self._version_dict["qiskit-finance"] = None
-        try:
-            import qiskit_optimization
-
-            self._version_dict["qiskit-optimization"] = qiskit_optimization.__version__
-        except Exception:
-            self._version_dict["qiskit-optimization"] = None
-        try:
-            import qiskit_machine_learning
-
-            self._version_dict["qiskit-machine-learning"] = qiskit_machine_learning.__version__
-        except Exception:
-            self._version_dict["qiskit-machine-learning"] = None
-        self._loaded = True
-
-    def __repr__(self):
-        if not self._loaded:
-            self._load_versions()
-        return repr(self._version_dict)
-
-    def __str__(self):
-        if not self._loaded:
-            self._load_versions()
-        return str(self._version_dict)
-
-    def __getitem__(self, key):
-        if not self._loaded:
-            self._load_versions()
-        return self._version_dict[key]
-
-    def __iter__(self):
-        if not self._loaded:
-            self._load_versions()
-        return iter(self._version_dict)
-
-    def __len__(self):
-        return len(self._version_dict)
-
-
-__qiskit_version__ = QiskitVersion()

releasenotes/notes/__qiskit_version__11305-bcf134513641462b.yaml

@@ -0,0 +1,8 @@
+---
+upgrade:
+  - |
+    The variable ``qiskit.__qiskit_version__`` is removed as it was deprecated since 
+    Qiskit 0.44 (released on July 2023).
+    Instead, you should use ``qiskit.__version__``. The other packages listed in the
+    former ``qiskit.__qiskit_version__`` have their own ``__version__`` module level dunder,
+    as standard in PEP 8.