fix HP-only mode

it was showing the bar intended as the warning that there's no HP
under the shield. but I tried it and that bar just makes it look like
there *is* a sliver of health, which there isn't. so it's better off
without that in either mode.

vacuum_gambit.p8

@@ -347,8 +347,7 @@ function drawhud()
  elseif mxs > 0 then
   vertmeter(121,67,124,124,cs,mxs,shlcols)
  elseif mxh > 1 then
-  line(121,124,124,124,0x89)
-  vertmeter(121,67,124,123,ch-1,mxh-1,hpcols)
+  vertmeter(121,67,124,124,ch-1,mxh-1,hpcols)
  else
   print("!", 122, 94, 9)
   print("!", 121, 93, 8)