🔨 Build scripts cleanup (#27157)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

buildroot/share/PlatformIO/scripts/common-dependencies.py

@@ -5,10 +5,10 @@
 import pioutil
 if pioutil.is_pio_build():
 
-    import subprocess,os,re,fnmatch,glob
+    import os, re, fnmatch, glob
     srcfilepattern = re.compile(r".*[.](cpp|c)$")
     marlinbasedir = os.path.join(os.getcwd(), "Marlin/")
-    Import("env")
+    env = pioutil.env
 
     from platformio.package.meta import PackageSpec
     from platformio.project.config import ProjectConfig