Revert "extendedcommands: Fix format SD card as ext4"

This reverts commit c7091c661e3bd85f5c1ce30875921620b355b357.
Revert "Add support to format SD card as F2FS."

This reverts commit 88e28fc28c9f302d68ff866ace4e34acf91eeeb3.
extendedcommands: Better way to format SD card as F2FS

Based on @philz-cwm6 's code review
extendedcommands: Convert tab to space indentation
extendedcommands: Use existing file_found() function

Thanks @philz-cwm6