Remove VirtualBox guest shared folders filesystem

This went into staging in rc7.  It turns out that was a mistake, and
apparently it wasn't even supposed to go there at all, but be introduced
as a regular filesystem.

We don't try to sneak in whole new filesystems this late in the rc, just
delete the whole thing, and it can be re-introduced as a proper patch
with proper acks from actual filesystem people instead of some odd
late-rc staging back-door.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -17338,12 +17338,6 @@ F:	include/linux/vbox_utils.h
 F:	include/uapi/linux/vbox*.h
 F:	drivers/virt/vboxguest/
 
-VIRTUAL BOX SHARED FOLDER VFS DRIVER:
-M:	Hans de Goede <hdegoede@redhat.com>
-L:	linux-fsdevel@vger.kernel.org
-S:	Maintained
-F:	drivers/staging/vboxsf/*
-
 VIRTUAL SERIO DEVICE DRIVER
 M:	Stephen Chandler Paul <thatslyude@gmail.com>
 S:	Maintained

drivers/staging/Kconfig

@@ -125,6 +125,4 @@ source "drivers/staging/exfat/Kconfig"
 
 source "drivers/staging/qlge/Kconfig"
 
-source "drivers/staging/vboxsf/Kconfig"
-
 endif # STAGING

drivers/staging/Makefile

@@ -53,4 +53,3 @@ obj-$(CONFIG_UWB)		+= uwb/
 obj-$(CONFIG_USB_WUSB)		+= wusbcore/
 obj-$(CONFIG_EXFAT_FS)		+= exfat/
 obj-$(CONFIG_QLGE)		+= qlge/
-obj-$(CONFIG_VBOXSF_FS)		+= vboxsf/