drop terminal palette index value

After last commit there are no holes in the palette any more, and each
color is declared at the array index corresponding to its palette index.
That makes this element superfluous.

Author: ap

autoload/css_color.vim

@@ -55,36 +55,36 @@ if has('gui_running')
 else
 	" preset 16 vt100 colors
 	let s:xtermcolor = [
-		\ [ 0x00, 0x00, 0x00,  0 ],
-		\ [ 0xCD, 0x00, 0x00,  1 ],
-		\ [ 0x00, 0xCD, 0x00,  2 ],
-		\ [ 0xCD, 0xCD, 0x00,  3 ],
-		\ [ 0x00, 0x00, 0xEE,  4 ],
-		\ [ 0xCD, 0x00, 0xCD,  5 ],
-		\ [ 0x00, 0xCD, 0xCD,  6 ],
-		\ [ 0xE5, 0xE5, 0xE5,  7 ],
-		\ [ 0x7F, 0x7F, 0x7F,  8 ],
-		\ [ 0xFF, 0x00, 0x00,  9 ],
-		\ [ 0x00, 0xFF, 0x00, 10 ],
-		\ [ 0xFF, 0xFF, 0x00, 11 ],
-		\ [ 0x5C, 0x5C, 0xFF, 12 ],
-		\ [ 0xFF, 0x00, 0xFF, 13 ],
-		\ [ 0x00, 0xFF, 0xFF, 14 ],
-		\ [ 0xFF, 0xFF, 0xFF, 15 ]]
+		\ [ 0x00, 0x00, 0x00 ],
+		\ [ 0xCD, 0x00, 0x00 ],
+		\ [ 0x00, 0xCD, 0x00 ],
+		\ [ 0xCD, 0xCD, 0x00 ],
+		\ [ 0x00, 0x00, 0xEE ],
+		\ [ 0xCD, 0x00, 0xCD ],
+		\ [ 0x00, 0xCD, 0xCD ],
+		\ [ 0xE5, 0xE5, 0xE5 ],
+		\ [ 0x7F, 0x7F, 0x7F ],
+		\ [ 0xFF, 0x00, 0x00 ],
+		\ [ 0x00, 0xFF, 0x00 ],
+		\ [ 0xFF, 0xFF, 0x00 ],
+		\ [ 0x5C, 0x5C, 0xFF ],
+		\ [ 0xFF, 0x00, 0xFF ],
+		\ [ 0x00, 0xFF, 0xFF ],
+		\ [ 0xFF, 0xFF, 0xFF ]]
 
 	" the 6 values used in the xterm color cube
 	"                    0    95   135   175   215   255
 	let s:cubergb = [ 0x00, 0x5F, 0x87, 0xAF, 0xD7, 0xFF ]
 	for s:rrr in s:cubergb
 		for s:ggg in s:cubergb
 			for s:bbb in s:cubergb
-				call add( s:xtermcolor, [ s:rrr, s:ggg, s:bbb, len(s:xtermcolor) ] )
+				call add( s:xtermcolor, [ s:rrr, s:ggg, s:bbb ] )
 			endfor
 		endfor
 	endfor
 
 	" grayscale ramp
-	let s:xtermcolor += map(range(24),'repeat([10*v:val+8],3) + [v:val+232]')
+	let s:xtermcolor += map( range(24), 'repeat( [10 * v:val + 8], 3 )' )
 
 	" selects the nearest xterm color for a rgb value like #FF0000
 	function! s:rgb2xterm(color)
@@ -95,7 +95,8 @@ else
 		let g = s:hex[color[2:3]]
 		let b = s:hex[color[4:5]]
 
-		for [tr,tg,tb,idx] in s:xtermcolor
+		for idx in range(len(s:xtermcolor))
+			let [tr,tg,tb] = s:xtermcolor[idx]
 			let dr = tr - r
 			let dg = tg - g
 			let db = tb - b