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

This reverts commit a70c33a68e, reversing
changes made to f515f9c03a.

lib/ArduinoJson/test/JsonObject/containsKey.cpp

@@ -1,30 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#include <ArduinoJson.h>
-#include <catch.hpp>
-
-TEST_CASE("JsonObject::containsKey()") {
-  DynamicJsonBuffer _jsonBuffer;
-  JsonObject& _object = _jsonBuffer.createObject();
-
-  SECTION("ContainsKeyReturnsFalseForNonExistingKey") {
-    _object.set("hello", 42);
-
-    REQUIRE(false == _object.containsKey("world"));
-  }
-
-  SECTION("ContainsKeyReturnsTrueForDefinedValue") {
-    _object.set("hello", 42);
-
-    REQUIRE(true == _object.containsKey("hello"));
-  }
-
-  SECTION("ContainsKeyReturnsFalseAfterRemove") {
-    _object.set("hello", 42);
-    _object.remove("hello");
-
-    REQUIRE(false == _object.containsKey("hello"));
-  }
-}