Remove tests for buildPython version 2.7, since it's no longer availa…

…ble on GitHub Actions

.github/workflows/ci.yml

@@ -82,10 +82,9 @@ jobs:
       - uses: ./.github/actions/setup-python
         id: setup-python
         with:
-          # This should match OLD_BUILD_PYTHON_VERSIONS and MIN_BUILD_PYTHON_VERSION
+          # This should match OLD_BUILD_PYTHON_VERSION and MIN_BUILD_PYTHON_VERSION
           # in test_gradle_plugin.
           extra-versions: |
-            2.7
             3.6
             3.7
 

product/gradle-plugin/src/main/python/chaquopy/pip_install.py

@@ -1,8 +1,5 @@
 #!/usr/bin/env python3
 
-# Keep valid Python 2 syntax so we can produce an error message.
-from __future__ import absolute_import, division, print_function
-
 # Do this as early as possible to minimize the chance of something else going wrong and causing
 # a less comprehensible error message.
 from .util import check_build_python

product/gradle-plugin/src/main/python/chaquopy/pyc.py

@@ -1,8 +1,5 @@
 #!/usr/bin/env python3
 
-# Keep valid Python 2 syntax so we can produce an error message.
-from __future__ import absolute_import, division, print_function
-
 # Do this as early as possible to minimize the chance of something else going wrong and causing
 # a less comprehensible error message.
 from .util import check_build_python

product/gradle-plugin/src/main/python/chaquopy/static_proxy.py

@@ -1,8 +1,5 @@
 #!/usr/bin/env python3
 
-# Keep valid Python 2 syntax so we can produce an error message.
-from __future__ import absolute_import, division, print_function
-
 # Do this as early as possible to minimize the chance of something else going wrong and causing
 # a less comprehensible error message.
 from .util import check_build_python

product/gradle-plugin/src/main/python/chaquopy/util.py

@@ -1,6 +1,3 @@
-# Keep valid Python 2 syntax so we can produce an actionable error message.
-from __future__ import absolute_import, division, print_function
-
 import sys
 
 

product/gradle-plugin/src/test/integration/test_gradle_plugin.py

@@ -72,10 +72,8 @@ def run_build_python(args, **kwargs):
                              .split()[1])
 BUILD_PYTHON_VERSION = BUILD_PYTHON_VERSION_FULL.rpartition(".")[0]
 
-# These should match `extra-versions` in the ci.yml job `test-integration`. 2.7 is
-# included to make sure we've kept valid Python 2 syntax, so we can produce a useful
-# error message.
-OLD_BUILD_PYTHON_VERSIONS = ["2.7", "3.6"]
+# These should match `extra-versions` in the ci.yml job `test-integration`.
+OLD_BUILD_PYTHON_VERSION = "3.6"
 MIN_BUILD_PYTHON_VERSION = "3.7"
 
 MAX_BUILD_PYTHON_VERSION = "3.11"
@@ -765,11 +763,9 @@ def test_buildpython(self):
                                              "no_binary_sdist/__init__.py"],
                                pyc=["stdlib"])
 
-        for version in OLD_BUILD_PYTHON_VERSIONS:
-            with self.subTest(version=version):
-                run = self.RunGradle(*layers, env={"buildpython_version": version},
-                                     succeed=False)
-                self.assertInLong(BuildPython.old_version_error(version), run.stderr, re=True)
+        run = self.RunGradle(*layers, env={"buildpython_version": OLD_BUILD_PYTHON_VERSION},
+                             succeed=False)
+        self.assertInLong(BuildPython.old_version_error(version), run.stderr, re=True)
 
     def test_buildpython_missing(self):
         run = self.RunGradle(
@@ -1427,11 +1423,9 @@ def test_buildpython(self):
                                classes={"chaquopy_test.a": ["SrcA1"]},
                                pyc=["stdlib"])
 
-        for version in OLD_BUILD_PYTHON_VERSIONS:
-            with self.subTest(version=version):
-                run = self.RunGradle(*layers, env={"buildpython_version": version},
-                                     succeed=False)
-                self.assertInLong(BuildPython.old_version_error(version), run.stderr, re=True)
+        run = self.RunGradle(*layers, env={"buildpython_version": OLD_BUILD_PYTHON_VERSION},
+                             succeed=False)
+        self.assertInLong(BuildPython.old_version_error(version), run.stderr, re=True)
 
     def test_buildpython_missing(self):
         run = self.RunGradle(