remove references of apm from here. when we have some power management

here they'll come back.  deraadt@ ok.

src/etc/etc.amd64/sysctl.conf

@@ -1,4 +1,2 @@
 #machdep.allowaperture=2	# See xf86(4)
-#machdep.apmwarn=10		# battery % when apm status messages enabled
-#machdep.apmhalt=0		# 1=powerdown hack, try if halt -p doesn't work
 #machdep.kbdreset=1		# permit console CTRL-ALT-DEL to do a nice halt