sbt: Remove duplicate package

pkgs/development/tools/build-managers/sbt/default.nix

@@ -1,27 +0,0 @@
-{ stdenv, fetchurl, writeScript, bash, jre }:
-
-let 
-
-  sbt = writeScript "sbt.sh" ''
-    #!${bash}/bin/bash
-    ${jre}/bin/java -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled \
-      -XX:MaxPermSize=384M -jar @out@/lib/sbt-launch.jar "$@"
-  '';
-
-in stdenv.mkDerivation rec {
-  name = "sbt-${version}";
-
-  version = "0.12.3";
-
-  src = fetchurl {
-    url = "http://scalasbt.artifactoryonline.com/scalasbt/sbt-native-packages/org/scala-sbt/sbt/${version}/sbt.tgz";
-    sha256 = "154ydaxd6ink5sy4flzpyh47nnhgkxwpzmml8q16am7655fpib08";
-  };
-
-  installPhase = ''
-    mkdir -p $out/lib $out/bin
-    mv bin/sbt-launch.jar $out/lib/
-    cp ${sbt} $out/bin/sbt
-    substituteInPlace $out/bin/sbt --replace @out@ $out
-  '';
-}

pkgs/top-level/all-packages.nix

@@ -3537,8 +3537,6 @@ let
     jre = jdk;
   };
 
-  sbt = callPackage ../development/tools/build-managers/sbt { };
-
   scons = callPackage ../development/tools/build-managers/scons { };
 
   simpleBuildTool = callPackage ../development/tools/build-managers/simple-build-tool { };