Remove irrelevant sub-command `ip`

Conventional ip wrapper -- not desktop-related.

mkit/config.ini

     src/libexec/saturnin-clip               = saturnin-clip
     src/libexec/saturnin-dmenu              = saturnin-dmenu
     src/libexec/saturnin-iam                = saturnin-iam
-    src/libexec/saturnin-ip                 = saturnin-ip
     src/libexec/saturnin-kb                 = saturnin-kb
     src/libexec/saturnin-ln                 = saturnin-ln
     src/libexec/saturnin-www                = saturnin-www

src/libexec/saturnin-ip

-#!/bin/bash
-
-. $(ffoom path)
-
-ffoo import pretty
-ffoo import types
-
-mkbrief() {
-    local line ifno maybe_ifno ifname ipinfo
-    while read line;
-    do
-        maybe_ifno=${line%%:*}
-        debug -v maybe_ifno
-        if is_integer "$maybe_ifno";
-        then
-            ifno=$maybe_ifno
-            ifname=${line##$ifno: }
-            ifname=${ifname%%:*}
-            debug -v ifno ifname
-        elif grep -qs '^inet ' <<<"$line";
-        then
-            ipv4=${line##inet }
-            ipv4=${ipv4%% *}
-            debug -v ipv4
-            printf "%-7s %s\n" $ifname $ipv4
-        fi
-    done
-}
-
-ip addr show | mkbrief