Remove unused gettext versions

pkgs/development/libraries/gettext/0.17.nix

···
-{ stdenv, fetchurl, libiconv }:
-
-stdenv.mkDerivation rec {
-  name = "gettext-0.17";
-
-  src = fetchurl {
-    url = "mirror://gnu/gettext/${name}.tar.gz";
-    sha256 = "1fipjpaxxwifdw6cbr7mkxp1yvy643i38nhlh7124bqnisxki5i0";
-  };
-
-  configureFlags = "--disable-csharp";
-
-  # On cross building, gettext supposes that the wchar.h from libc
-  # does not fulfill gettext needs, so it tries to work with its
-  # own wchar.h file, which does not cope well with the system's
-  # wchar.h and stddef.h (gcc-4.3 - glibc-2.9)
-  preConfigure = ''
-    if test -n "$crossConfig"; then
-      echo gl_cv_func_wcwidth_works=yes > cachefile
-      configureFlags="$configureFlags --cache-file=`pwd`/cachefile"
-    fi
-  '';
-
-  buildInputs = stdenv.lib.optional (!stdenv.isLinux) libiconv;
-
-  meta = {
-    description = "GNU gettext, a well integrated set of translation tools and documentation";
-
-    longDescription = ''
-      Usually, programs are written and documented in English, and use
-      English at execution time for interacting with users.  Using a common
-      language is quite handy for communication between developers,
-      maintainers and users from all countries.  On the other hand, most
-      people are less comfortable with English than with their own native
-      language, and would rather be using their mother tongue for day to
-      day's work, as far as possible.  Many would simply love seeing their
-      computer screen showing a lot less of English, and far more of their
-      own language.
-
-      GNU `gettext' is an important step for the GNU Translation Project, as
-      it is an asset on which we may build many other steps. This package
-      offers to programmers, translators, and even users, a well integrated
-      set of tools and documentation. Specifically, the GNU `gettext'
-      utilities are a set of tools that provides a framework to help other
-      GNU packages produce multi-lingual messages.
-    '';
-
-    homepage = http://www.gnu.org/software/gettext/;
-
-    maintainers = [ ];
-    branch = "0.17";
-  };
-}

pkgs/development/libraries/gettext/0.18.nix

···
-{ stdenv, fetchurl, gettext }:
-
-stdenv.lib.overrideDerivation gettext (attrs: rec {
-  name = "gettext-0.18.2";
-
-  src = fetchurl {
-    url = "mirror://gnu/gettext/${name}.tar.gz";
-    sha256 = "516a6370b3b3f46e2fc5a5e222ff5ecd76f3089bc956a7587a6e4f89de17714c";
-  };
-
-})

pkgs/top-level/all-packages.nix

···
 
   getdata = callPackage ../development/libraries/getdata { };
 
-  gettext = gettext_0_19;
-
-  gettext_0_17 = callPackage ../development/libraries/gettext/0.17.nix { };
-  gettext_0_18 = callPackage ../development/libraries/gettext/0.18.nix { };
-  gettext_0_19 = callPackage ../development/libraries/gettext { };
+  gettext = callPackage ../development/libraries/gettext { };
 
-  gettextWithExpat = gettext: callPackage ../development/libraries/gettext/expat.nix {
-    inherit gettext;
-  };
+  gettextWithExpat = callPackage ../development/libraries/gettext/expat.nix { };
 
   gd = callPackage ../development/libraries/gd { };
 
···
   };
 
   gtk3 = callPackage ../development/libraries/gtk+/3.x.nix {
-    gettext = gettextWithExpat gettext_0_19;
+    gettext = gettextWithExpat;
   };
 
   gtk = pkgs.gtk2;