Deleted test to let students allow or not degenerate triangles (exercism#550)

Author: ryanzidago

exercises/triangle/test/triangle_test.exs

@@ -66,11 +66,6 @@ defmodule TriangleTest do
     assert Triangle.kind(1, 1, 3) == {:error, "side lengths violate triangle inequality"}
   end
 
-  @tag :pending
-  test "triangles violating triangle inequality are illegal 2" do
-    assert Triangle.kind(2, 4, 2) == {:error, "side lengths violate triangle inequality"}
-  end
-
   @tag :pending
   test "triangles violating triangle inequality are illegal 3" do
     assert Triangle.kind(7, 3, 2) == {:error, "side lengths violate triangle inequality"}