🔨 Build scripts cleanup (#27157)

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

buildroot/share/PlatformIO/scripts/STM32F1_create_variant.py

@@ -3,10 +3,9 @@
 #
 import pioutil
 if pioutil.is_pio_build():
-    import shutil,marlin
+    import shutil, marlin
     from pathlib import Path
-
-    Import("env")
+    env = pioutil.env
     platform = env.PioPlatform()
     board = env.BoardConfig()