chore: remove bigquery and spanner from centralization PR

Author: chalmerlowe

packages/google-cloud-bigquery/mypy.ini

@@ -0,0 +1,3 @@
+[mypy]
+python_version = 3.14
+namespace_packages = True

packages/google-cloud-bigquery/noxfile.py

@@ -41,17 +41,6 @@
 ALL_PYTHON = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 UNIT_TEST_PYTHON_VERSIONS = ALL_PYTHON
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
-# Path to the centralized mypy configuration file at the repository root.
-# Search upwards to support running nox from both monorepo packages and integration test goldens.
-MYPY_CONFIG_FILE = next(
-    (
-        str(p / "mypy.ini")
-        for p in CURRENT_DIRECTORY.parents
-        if (p / "mypy.ini").exists()
-    ),
-    str(CURRENT_DIRECTORY.parent.parent / "mypy.ini"),
-)
-
 
 SYSTEM_TEST_PYTHON_VERSIONS = UNIT_TEST_PYTHON_VERSIONS
 
@@ -226,13 +215,7 @@ def mypy(session):
     )
     session.run("python", "-m", "pip", "freeze")
     with log_package_context(session):
-        session.run(
-            "mypy",
-            f"--config-file={MYPY_CONFIG_FILE}",
-            "-p",
-            "google",
-            "--show-traceback",
-        )
+        session.run("mypy", "-p", "google", "--show-traceback")
 
 
 @nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)

packages/google-cloud-spanner/mypy.ini

@@ -0,0 +1,15 @@
+[mypy]
+python_version = 3.14
+namespace_packages = True
+ignore_missing_imports = False
+
+# TODO(https://github.com/googleapis/gapic-generator-python/issues/2563):
+# Dependencies that historically lacks py.typed markers
+[mypy-google.iam.*]
+ignore_missing_imports = True
+
+# Helps mypy navigate the 'google' namespace more reliably in 3.10+
+explicit_package_bases = True
+
+# Performance: reuse results from previous runs to speed up 'nox'
+incremental = True

packages/google-cloud-spanner/noxfile.py

@@ -69,17 +69,6 @@
 SYSTEM_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
 CURRENT_DIRECTORY = pathlib.Path(__file__).parent.absolute()
-# Path to the centralized mypy configuration file at the repository root.
-# Search upwards to support running nox from both monorepo packages and integration test goldens.
-MYPY_CONFIG_FILE = next(
-    (
-        str(p / "mypy.ini")
-        for p in CURRENT_DIRECTORY.parents
-        if (p / "mypy.ini").exists()
-    ),
-    str(CURRENT_DIRECTORY.parent.parent / "mypy.ini"),
-)
-
 
 nox.options.sessions = [
     "unit-3.10",
@@ -778,7 +767,6 @@ def mypy(session):
     session.install(".")
     session.run(
         "mypy",
-        f"--config-file={MYPY_CONFIG_FILE}",
         "-p",
         "google",
         # "--check-untyped-defs",