The plugin abook_take was removed through commits 13234--13236.

po/xgetpo

@@ -49,8 +49,6 @@ xgettext ${XGETTEXT_OPTIONS} -j \
     
 # ** Plugins
     
-xgettext ${XGETTEXT_OPTIONS} -j \
-    plugins/abook_take/*.php --output=po/squirrelmail.pot
 xgettext ${XGETTEXT_OPTIONS} -j \
     plugins/administrator/*.php --output=po/squirrelmail.pot
 xgettext ${XGETTEXT_OPTIONS} -j \