Remove the font setting under gui mode

Osaka-mono font is missing under Linux

Signed-off-by: Wenwei Cai <stanley.w.cai@gmail.com>

vimrc

@@ -37,7 +37,7 @@ syntax on		" syntax highlight
 set hlsearch		" search highlighting
 
 if has("gui_running")	" GUI color and font settings
-  set guifont=Osaka-Mono:h20
+  "set guifont=Osaka-Mono:h20
   set background=dark 
   set t_Co=256          " 256 color mode
   set cursorline        " highlight current line