Remove useless function.

This function was from the first attempt at a curses interface.  Since we're
using urwid now instead of curses directly, we don't need it anymore.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>

newfol

@@ -52,9 +52,6 @@ class DatabaseData:
         self.records = recs
         self.mapping = mapping
 
-def convert_color(x):
-    return int(x * 1000 / 255)
-
 class View:
     def render(self, loop):
         pass