Revert "Add exfat/ntfs support for modules or static mode."

This reverts commit a3fd4330edc5ba7f929abc9dd7271ffc5a45a788.
Revert "Add Flash-Friendly File System (f2fs) support."

This reverts commit 073f747b96d83162be836c568aa310c62dba01b1.
Revert "Ext4: SD card write access workaround"

This reverts commit 793e38ddfbe605357039b350cc5e6641a05be89b.