remove a testcase for specs

tests/dep_spec.lua

@@ -51,20 +51,5 @@ describe("package specification", function()
         }
       }
     )
-
-    assert.same(
-      dep_spec_man.check({
-        "user/package",
-        deps = {
-          { { "user/dependency" } }
-        }
-      }, true),
-      {
-        "user/package",
-        deps = {
-          "user/dependency"
-        }
-      }
-    )
   end)
 end)