Switch notebooks from dev to stable cirq where possible (#7247)

* Remove obsolete note about installing cirq-dev

The notebook actually installs and tests with stable cirq.

* Switch from dev to stable cirq in notebooks where it works

Ref: https://github.com/quantumlib/Cirq/blob/main/docs/dev/notebooks.md#lifecycle

* Exclude xeb_calibration_example.ipynb notebook from isolated_notebook_test.py

This notebook is also excluded in notebook_test.py which tests with head cirq.

* Delete unused tst files

- calibration_api.ipynb was removed in #6580
- operators_and_observables.ipynb was renamed to operators.ipynb and
  it does not match the operators.txt replacement anymore

* Typo `mehod` -> `method`

Author: pavoljuhas

cirq-core/cirq/contrib/quimb/Cirq-to-Tensor-Networks.ipynb

@@ -87,9 +87,7 @@
    "metadata": {},
    "source": [
     "### Circuit to Tensors\n",
-    "The circuit defines a tensor network representation. By default, the initial state is the `|0...0>` state (represented by the \"zero qubit\" operations labeled \"Q0\" in the legend. \"Q1\" are single qubit operations and \"Q2\" are two qubit operations. The open legs are the indices into the state vector and are of the form \"i{m}_q{n}\" where `m` is the time index (given by the returned `qubit_frontier` dictionary) and \"n\" is the qubit string.\n",
-    "\n",
-    "Note: this notebook relies on unreleased Cirq features. If you want to try these features, make sure you install cirq via `pip install --upgrade cirq~=1.0.dev`."
+    "The circuit defines a tensor network representation. By default, the initial state is the `|0...0>` state (represented by the \"zero qubit\" operations labeled \"Q0\" in the legend. \"Q1\" are single qubit operations and \"Q2\" are two qubit operations. The open legs are the indices into the state vector and are of the form \"i{m}_q{n}\" where `m` is the time index (given by the returned `qubit_frontier` dictionary) and \"n\" is the qubit string."
    ]
   },
   {

cirq-core/cirq/contrib/quimb/Contract-a-Grid-Circuit.ipynb

@@ -4,8 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Setup\n",
-    "Note: this notebook relies on unreleased Cirq features. If you want to try these features, make sure you install cirq via `pip install --upgrade cirq~=1.0.dev`."
+    "## Setup"
    ]
   },
   {
@@ -20,14 +19,14 @@
     "    import cirq\n",
     "except ImportError:\n",
     "    print(\"installing cirq...\")\n",
-    "    !pip install --upgrade --quiet cirq~=1.0.dev\n",
+    "    !pip install --quiet cirq\n",
     "    print(\"installed cirq.\")\n",
     "\n",
     "try:\n",
     "    import quimb\n",
     "except ImportError:\n",
     "    print(\"installing cirq-core[contrib]...\")\n",
-    "    !pip install --upgrade --quiet 'cirq-core[contrib]~=1.0.dev'\n",
+    "    !pip install --quiet 'cirq-core[contrib]'\n",
     "    print(\"installed cirq-core[contrib].\")"
    ]
   },
@@ -36,9 +35,7 @@
    "metadata": {},
    "source": [
     "# Contract a Grid Circuit\n",
-    "Shallow circuits on a planar grid with low-weight observables permit easy contraction.\n",
-    "\n",
-    "Note: this notebook relies on unreleased Cirq features. If you want to try these features, make sure you install cirq via `pip install --upgrade cirq~=1.0.dev`."
+    "Shallow circuits on a planar grid with low-weight observables permit easy contraction."
    ]
   },
   {

dev_tools/notebooks/isolated_notebook_test.py

@@ -42,12 +42,8 @@
 # Please, always indicate in comments the feature used for easier bookkeeping.
 
 NOTEBOOKS_DEPENDING_ON_UNRELEASED_FEATURES: List[str] = [
-    # Requires pinned quimb from #6438
-    'cirq-core/cirq/contrib/quimb/Contract-a-Grid-Circuit.ipynb',
     # Requires OpenQASM 3.0 support from cirq 1.5
     'docs/build/interop.ipynb',
-    # get_qcs_objects_for_notebook
-    'docs/noise/qcvv/xeb_calibration_example.ipynb',
     # Requires features in cirq 1.5.
     'docs/build/classical_control.ipynb',
 ]
@@ -72,6 +68,8 @@
     'examples/advanced/*quantum_utility*',
     # Also skipping stabilizer code testing.
     "examples/*stabilizer_code*",
+    # get_qcs_objects_for_notebook
+    'docs/noise/qcvv/xeb_calibration_example.ipynb',
     # An intentionally empty/template code notebook.
     "docs/simulate/qvm_builder_code.ipynb",
     *NOTEBOOKS_DEPENDING_ON_UNRELEASED_FEATURES,

docs/gatezoo.ipynb

@@ -60,8 +60,7 @@
     "id": "541571c2edcd"
    },
    "source": [
-    "## Setup\n",
-    "Note: this notebook relies on unreleased Cirq features. If you want to try these features, make sure you install cirq via `pip install --upgrade cirq~=1.0.dev`"
+    "## Setup"
    ]
   },
   {
@@ -76,7 +75,7 @@
     "    import cirq\n",
     "except ImportError:\n",
     "    print(\"installing cirq...\")\n",
-    "    !pip install --upgrade --quiet cirq~=1.0.dev\n",
+    "    !pip install --quiet cirq\n",
     "    print(\"installed cirq.\")\n",
     "    \n",
     "import IPython.display as ipd\n",

docs/noise/calibration_api.tst

@@ -231,7 +231,7 @@
     "\n",
     "Any valid tag can be used as a \"no-compile\" tag by adding it to the `tags_to_ignore` field in `cirq.TransformerContext`. When called with a context, cirq transformers will inspect the `context.tags_to_ignore` field and ignore an operation if `op.tags & context.tags_to_ignore` is not empty. \n",
     "\n",
-    "Below, you can use no-compile tags when transforming a circuit using the `optimize_circuit` mehod defined above."
+    "Below, you can use no-compile tags when transforming a circuit using the `optimize_circuit` method defined above."
    ]
   },
   {