Revert "Add a kafka package". Closes #6892

This reverts commit b34a1cc248.

Conflicts:
	pkgs/top-level/all-packages.nix

Duplicate package kafka, already existed and used in the nixos service.

Retained the boothead addition to maintainers.

pkgs/servers/kafka/default.nix

@@ -1,34 +0,0 @@
-{ stdenv, fetchurl, jre, makeWrapper, bash }:
-
-stdenv.mkDerivation rec {
-	name = "kafka";
-        version = "0.8.1.1";
-	src = fetchurl {
-		url = "http://www.mirrorservice.org/sites/ftp.apache.org/${name}/${version}/${name}_2.9.2-${version}.tgz";
-		sha256 = "cb141c1d50b1bd0d741d68e5e21c090341d961cd801e11e42fb693fa53e9aaed";
-	};
-
-	buildInputs = [ makeWrapper jre ];
-
-	installPhase = ''
-		mkdir -p $out
-		cp -R config libs $out
-		mkdir -p $out/bin
-		cp -R bin/${name}-*.sh $out/bin
-		for i in $out/bin/${name}-*.sh; do
-			wrapProgram $i \
-				--set JAVA_HOME "${jre}" \
-				--prefix PATH : "${bash}/bin"
-		done
-                
-	'';
-
-	meta = with stdenv.lib; {
-		homepage = "http://kafka.apache.org";
-		description = "Apache Kafka";
-		license = licenses.asl20;
-		maintainers = [ maintainers.boothead ];	
-		platforms = platforms.unix;	
-	};		
-
-}

pkgs/top-level/all-packages.nix

@@ -8173,8 +8173,6 @@ let
 
   joseki = callPackage ../servers/http/joseki {};
 
-  kafka = callPackage ../servers/kafka { };
-
   rdkafka = callPackage ../development/libraries/rdkafka { };
 
   leafnode = callPackage ../servers/news/leafnode { };