emem: deprecate phases

pkgs/applications/misc/emem/default.nix

···
     sha256 = "18x3s3jrph8k3pc75jgwkfqazygpsx93zjxx68zms58my17cybh1";
   };
 
-  phases = [ "buildPhase" "installPhase" ];
+  dontUnpack = true;
 
   buildPhase = ''
     mkdir -p $out/bin $out/share/java