kafka: Remove 0.8

pkgs/servers/apache-kafka/default.nix

···
 
 let
   versionMap = {
-    "0.8" = {
-      kafkaVersion = "0.8.2.2";
-      scalaVersion = "2.10";
-      sha256 = "1azccf1k0nr8y1sfpjgqf9swyp87ypvgva68ci4kczwcx1z9d89v";
-    };
     "0.9" = {
       kafkaVersion = "0.9.0.1";
       scalaVersion = "2.11";

pkgs/top-level/all-packages.nix

···
   apacheAnt = callPackage ../development/tools/build-managers/apache-ant { };
 
   apacheKafka = apacheKafka_1_0;
-  apacheKafka_0_8 = callPackage ../servers/apache-kafka { majorVersion = "0.8"; };
   apacheKafka_0_9 = callPackage ../servers/apache-kafka { majorVersion = "0.9"; };
   apacheKafka_0_10 = callPackage ../servers/apache-kafka { majorVersion = "0.10"; };
   apacheKafka_0_11 = callPackage ../servers/apache-kafka { majorVersion = "0.11"; };