Remove check for old versions of Vim.

There was some check regarding specific features Vim have, like
spell check which was introduced with Vim 7.0, and even on old
repositories, the oldest version of Vim I could find is 7.4. Let's get
rid of unnecessary legacy.

colors/wombat256grf.vim

@@ -10,12 +10,10 @@
 
 set background=dark
 
-if version > 580
 hi clear
 if exists("syntax_on")
     syntax reset
 endif
-endif
 
 let g:colors_name = "wombat256grf"
 
@@ -161,13 +159,9 @@ call s:highlight("Normal",       "dddddd",   "242424",   "none")
 call s:highlight("NonText",      "4c4c36",   "",         "none")
 call s:highlight("Cursor",       "222222",   "ecee90",   "none")
 
-if version > 700
 call s:highlight("CursorLine",   "", "32322e",   "none")
 hi link CursorColumn CursorLine
-    if version > 703
 call s:highlight("ColorColumn", "", "2d2d2d", "")
-    endif
-endif
 
 call s:highlight("Search",       "444444",   "ffab4b",   "")
 call s:highlight("MatchParen",   "ecee90",   "857b6f",   "bold")
@@ -245,13 +239,11 @@ call s:highlight("DiffDelete", "343434", "101010", "bold")
 call s:highlight("DiffChange", "", "53402d", "bold")
 
 " Spellchek
-if  version > 700
+" Spell, make it underline, and less bright colors. only for terminal
-    " spell, make it underline, and less bright colors. only for terminal
 call s:undercurl("SpellBad", "881000")
 call s:undercurl("SpellCap", "003288")
 call s:undercurl("SpellRare", "73009F")
 call s:undercurl("SpellLocal", "A0CC00")
-endif
 
 " Plugins:
 " ShowMarks