Trim comment essays and hoist function-local test imports

tests/unit_tests/build_helpers/test_ninja.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 import os
 from pathlib import Path
+import subprocess
 import sys
 from unittest.mock import MagicMock, patch
 
@@ -84,7 +85,6 @@ def test_shell_token_quotes_shell_metacharacters() -> None:
 def test_shell_token_posix_roundtrips_through_sh() -> None:
     """Backslash runs, $, backticks, and quotes must reach the compiler
     exactly as lexed once ninja un-doubles $$ and /bin/sh strips quotes."""
-    import subprocess
 
     if sys.platform == "win32":
         pytest.skip("POSIX sh quoting")

tests/unit_tests/test_espidf_framework.py

@@ -1395,8 +1395,6 @@ def test_get_framework_env_without_python_env_uses_os_path(tmp_path: Path) -> No
 
 def _ccache_patches(tmp_path: Path, which: str | None, build_path: Path | None):
     return (
-        # The gate defers to the shared resolver (which carries the PATH
-        # lookup, ESPHOME_CCACHE_ENABLE parse, and runnability probe)
         patch("esphome.espidf.framework.resolve_ccache_path", return_value=which),
         patch(
             "esphome.espidf.framework.get_idf_tools_path",