Finally removed all tracks to the Python 2.7

tests/test_examples.py

@@ -19,7 +19,6 @@ from glob import glob
 import pytest
 
 from platformio import fs, proc
-from platformio.compat import PY2
 from platformio.package.manager.platform import PlatformPackageManager
 from platformio.platform.factory import PlatformFactory
 from platformio.project.config import ProjectConfig
@@ -48,8 +47,6 @@ def pytest_generate_tests(metafunc):
         for root, _, files in os.walk(examples_dir):
             if "platformio.ini" not in files or ".skiptest" in files:
                 continue
-            if "zephyr-" in root and PY2:
-                continue
             group = os.path.basename(root)
             if "-" in group:
                 group = group.split("-", 1)[0]