yecc and leex are not available on custom compilers

Author: josevalim

lib/mix/test/mix/tasks/compile_test.exs

@@ -40,8 +40,7 @@ defmodule Mix.Tasks.CompileTest do
 
   @tag project: [compilers: [:elixir, :app, :custom]]
   test "compiles does not require all compilers available on manifest" do
-    assert Mix.Tasks.Compile.manifests() |> Enum.map(&Path.basename/1) ==
-             ["compile.yecc", "compile.leex", "compile.elixir"]
+    assert Mix.Tasks.Compile.manifests() |> Enum.map(&Path.basename/1) == ["compile.elixir"]
   end
 
   test "compiles a project with mixfile" do