Revert "vold: exFAT support"

This reverts commit ce6e95e153201be046736e2360f51d3bca48c9f4.

Conflicts:

	Exfat.cpp
Revert "vold: Add NTFS read+write support via ntfs-3g"

This reverts commit bcd5a74dc03344aaff54cd443d5e6582bd4dd832.

Conflicts:

	Ntfs.cpp
Revert "vold: add support for ext4 media"

This reverts commit e336c0ca31f2768661063220e2a1cb83fd55b92d.

Conflicts:

	Ext4.cpp
	Ext4.h
Revert "vold: use blkid to detect filesystem type"

This reverts commit fc1dcc1c50d2c6745d57dd7905c4e889a51e6af1.

Conflicts:

	Android.mk