Remove the three instances of :sf:, since we no longer support bad144

sector forwarding on those ide/esdi disks.

src/etc/etc.i386/disktab

@@ -1,4 +1,4 @@
-#	$OpenBSD: disktab,v 1.18 2005/02/07 06:08:10 david Exp $
+#	$OpenBSD: disktab,v 1.19 2006/10/04 01:04:22 krw Exp $
 
 # Disk geometry and partition layout tables.
 # Key:
@@ -31,7 +31,7 @@
 #
 
 qp120at|Quantum Peripherals 120MB IDE:\
-	:dt=ESDI:ty=winchester:se#512:nt#9:ns#32:nc#813:sf: \
+	:dt=ESDI:ty=winchester:se#512:nt#9:ns#32:nc#813: \
 	:pa#13824:oa#0:ta=4.2BSD:ba#4096:fa#512: \
 	:pb#13824:ob#13824:tb=swap: \
 	:pc#234144:oc#0: \
@@ -93,7 +93,7 @@ floppy5|5in|5.25in High Density Floppy:\
 	:pc#2400:oc#0:bc#4096:fc#512:
 
 maxtor4380|Maxtor XT4380E ESDI :\
-	:dt=ESDI:ty=winchester:se#512:nt#15:ns#36:nc#1222:sf: \
+	:dt=ESDI:ty=winchester:se#512:nt#15:ns#36:nc#1222: \
 	:pa#21600:oa#0:ta=4.2BSD:ba#4096:\
 	:pb#21600:ob#21600:tb=swap: \
 	:pc#659880:oc#0: \
@@ -101,7 +101,7 @@ maxtor4380|Maxtor XT4380E ESDI :\
 	:ph#398520:oh#269200:th=4.2BSD:bh#4096:fh#512:
 
 miniscribe9380|compaq38|Miniscribe 9380 ESDI :\
-	:ty=winchester:dt=ESDI:se#512:nt#15:ns#35:nc#1223:rm#3600:sf: \
+	:ty=winchester:dt=ESDI:se#512:nt#15:ns#35:nc#1223:rm#3600: \
 	:pa#21000:oa#0:ba#8192:fa#1024:ta=4.2BSD: \
 	:pb#42000:ob#21000:tb=swap: \
 	:pc#642075:oc#0: \