Revert "Merge branch 'master' of https://github.com/1technophile/OpenMQTTGateway"

This reverts commit a70c33a68e, reversing
changes made to f515f9c03a.

lib/ArduinoJson/test/JsonVariant/undefined.cpp

@@ -1,54 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#include <ArduinoJson.h>
-#include <catch.hpp>
-
-TEST_CASE("JsonVariant undefined") {
-  JsonVariant variant;
-
-  SECTION("AsLongReturns0") {
-    REQUIRE(0 == variant.as<long>());
-  }
-
-  SECTION("AsUnsignedReturns0") {
-    REQUIRE(0 == variant.as<unsigned>());
-  }
-
-  SECTION("AsStringReturnsNull") {
-    REQUIRE(0 == variant.as<char*>());
-  }
-
-  SECTION("AsDoubleReturns0") {
-    REQUIRE(0 == variant.as<double>());
-  }
-
-  SECTION("AsBoolReturnsFalse") {
-    REQUIRE(false == variant.as<bool>());
-  }
-
-  SECTION("AsArrayReturnInvalid") {
-    REQUIRE(JsonArray::invalid() == variant.as<JsonArray&>());
-  }
-
-  SECTION("AsConstArrayReturnInvalid") {
-    REQUIRE(JsonArray::invalid() == variant.as<const JsonArray&>());
-  }
-
-  SECTION("AsObjectReturnInvalid") {
-    REQUIRE(JsonObject::invalid() == variant.as<JsonObject&>());
-  }
-
-  SECTION("AsConstObjectReturnInvalid") {
-    REQUIRE(JsonObject::invalid() == variant.as<const JsonObject&>());
-  }
-
-  SECTION("AsArrayWrapperReturnInvalid") {
-    REQUIRE(JsonArray::invalid() == variant.as<JsonArray>());
-  }
-
-  SECTION("AsObjectWrapperReturnInvalid") {
-    REQUIRE(JsonObject::invalid() == variant.as<JsonObject>());
-  }
-}