aalib: cleanup, config.{sub,guess} updated by stdenv hook now

Signed-off-by: Alexander V. Nikolaev <[e-mail]>

pkgs/by-name/if/iftop/package.nix

···
   fetchurl,
   ncurses,
   libpcap,
-  automake,
   nixosTests,
 }:
 
···
   # Explicitly link against libgcc_s, to work around the infamous
   # "libgcc_s.so.1 must be installed for pthread_cancel to work".
   LDFLAGS = lib.optionalString stdenv.hostPlatform.isLinux "-lgcc_s";
-
-  preConfigure = ''
-    cp ${automake}/share/automake*/config.{sub,guess} config
-  '';
 
   buildInputs = [
     ncurses