remove useless comment, we have to return something. probably the doxygen comments need adjustment

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@38764 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/home.c

@@ -34,7 +34,6 @@ const char *G_home(void)
 
     G_fatal_error(_("Unable to determine user's home directory"));
 
-    /* why return NULL when we've already exit(1)'d with G_fatal_error() ?? */
     return NULL;
 }