Clean up appearance lib file and redundant colors calls in other files

themes/jonathan.zsh-theme

@@ -44,10 +44,7 @@ setprompt () {
     ###
     # See if we can use colors.
 
-    autoload colors zsh/terminfo
-    if [[ "$terminfo[colors]" -ge 8 ]]; then
-	colors
-    fi
+    autoload zsh/terminfo
     for color in RED GREEN YELLOW BLUE MAGENTA CYAN WHITE GREY; do
 	eval PR_$color='%{$terminfo[bold]$fg[${(L)color}]%}'
 	eval PR_LIGHT_$color='%{$fg[${(L)color}]%}'