procfs: remove usbfs and usbdevfs support

The usbfs and usbdevfs file systems have been deprecated since
Linux-2.6.32, so we remove the code to automount them.

X-Gentoo-Bug: 480312
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=480312

init.d/procfs.in

@@ -39,22 +39,5 @@ start()
 		fi
 	fi
 
-	# Check what USB fs the kernel support.  Currently
-	# 2.5+ kernels, and later 2.4 kernels have 'usbfs',
-	# while older kernels have 'usbdevfs'.
-	if [ -d /proc/bus/usb -a ! -e /proc/bus/usb/devices ]; then
-		local usbfs=$(grep -Fow usbfs /proc/filesystems ||
-			grep -Fow usbdevfs /proc/filesystems)
-		if [ -n "$usbfs" ]; then
-			ebegin "Mounting USB device filesystem [$usbfs]"
-			local usbgid="$(getent group usb | \
-				sed -e 's/.*:.*:\(.*\):.*/\1/')"
-			mount -t $usbfs \
-				-o ${usbgid:+devmode=0664,devgid=$usbgid,}noexec,nosuid \
-				usbfs /proc/bus/usb
-			eend $?
-		fi
-	fi
-
 	return 0
 }