🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

noxfile.py

@@ -103,7 +103,7 @@ def default(session, tests_path):
     session.run(
         "py.test",
         "--quiet",
-        f"--junitxml={os.path.split(tests_path)[-1]}_{session.python}_sponge_log.xml",
+        f"--junitxml=unit_{session.python}_sponge_log.xml",
         "--cov=db_dtypes",
         "--cov=tests/unit",
         "--cov-append",
@@ -115,104 +115,10 @@ def default(session, tests_path):
     )
 
 
-def prerelease(session, tests_path):
-    constraints_path = str(
-        CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
-    )
-
-    # PyArrow prerelease packages are published to an alternative PyPI host.
-    # https://arrow.apache.org/docs/python/install.html#installing-nightly-packages
-    session.install(
-        "--extra-index-url",
-        "https://pypi.fury.io/arrow-nightlies/",
-        "--prefer-binary",
-        "--pre",
-        "--upgrade",
-        "pyarrow",
-    )
-    session.install(
-        "--extra-index-url",
-        "https://pypi.anaconda.org/scipy-wheels-nightly/simple",
-        "--prefer-binary",
-        "--pre",
-        "--upgrade",
-        "pandas",
-    )
-    session.install(
-        "mock",
-        "asyncmock",
-        "pytest",
-        "pytest-cov",
-        "pytest-asyncio",
-        "-c",
-        constraints_path,
-    )
-
-    # Because we test minimum dependency versions on the minimum Python
-    # version, the first version we test with in the unit tests sessions has a
-    # constraints file containing all dependencies and extras.
-    with open(
-        CURRENT_DIRECTORY
-        / "testing"
-        / f"constraints-{UNIT_TEST_PYTHON_VERSIONS[0]}.txt",
-        encoding="utf-8",
-    ) as constraints_file:
-        constraints_text = constraints_file.read()
-
-    # Ignore leading whitespace and comment lines.
-    deps = [
-        match.group(1)
-        for match in re.finditer(
-            r"^\s*(\S+)(?===\S+)", constraints_text, flags=re.MULTILINE
-        )
-    ]
-
-    # We use --no-deps to ensure that pre-release versions aren't overwritten
-    # by the version ranges in setup.py.
-    session.install(*deps)
-    session.install("--no-deps", "-e", ".")
-
-    # Print out prerelease package versions.
-    session.run("python", "-m", "pip", "freeze")
-
-    # Run py.test against the unit tests.
-    session.run(
-        "py.test",
-        "--quiet",
-        f"--junitxml={os.path.split(tests_path)[-1]}_prerelease_{session.python}_sponge_log.xml",
-        "--cov=db_dtypes",
-        "--cov=tests/unit",
-        "--cov-append",
-        "--cov-config=.coveragerc",
-        "--cov-report=",
-        "--cov-fail-under=0",
-        tests_path,
-        *session.posargs,
-    )
-
-
-@nox.session(python=UNIT_TEST_PYTHON_VERSIONS[-1])
-def compliance(session):
-    """Run the compliance test suite."""
-    default(session, os.path.join("tests", "compliance"))
-
-
-@nox.session(python=UNIT_TEST_PYTHON_VERSIONS[-1])
-def compliance_prerelease(session):
-    """Run the compliance test suite with prerelease dependencies."""
-    prerelease(session, os.path.join("tests", "compliance"))
-
-
 @nox.session(python=UNIT_TEST_PYTHON_VERSIONS)
 def unit(session):
     """Run the unit test suite."""
-    default(session, os.path.join("tests", "unit"))
-
-
-@nox.session(python=UNIT_TEST_PYTHON_VERSIONS[-1])
-def unit_prerelease(session):
-    """Run the unit test suite with prerelease dependencies."""
-    prerelease(session, os.path.join("tests", "unit"))
+    default(session)
 
 
 @nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)