Remove Absinthe check

See this issue and comment: devonestes#27 (comment)

Author: Matthew Stewart-Ronnisch

lib/assertions/absinthe.ex

@@ -19,7 +19,7 @@ defmodule Assertions.Absinthe do
 
   and then all functions in this module will not need the schema passed explicitly into it.
   """
-  if match?({:module, _}, Code.ensure_compiled(Absinthe)) do
+
     require Assertions
 
     require ExUnit.Assertions
@@ -256,5 +256,5 @@ defmodule Assertions.Absinthe do
     defp merge_overrides(fields, overrides) do
       Enum.reduce(overrides, fields, &merge_overrides/2)
     end
-  end
+
 end