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

This reverts commit a70c33a68e, reversing
changes made to f515f9c03a.

lib/ArduinoJson/CMakeLists.txt

@@ -1,16 +0,0 @@
-# ArduinoJson - arduinojson.org
-# Copyright Benoit Blanchon 2014-2018
-# MIT License
-
-cmake_minimum_required(VERSION 3.0)
-project(ArduinoJson)
-
-enable_testing()
-
-if(${COVERAGE})
-	set(CMAKE_CXX_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
-endif()
-
-include_directories(${CMAKE_CURRENT_LIST_DIR}/src)
-add_subdirectory(third-party/catch)
-add_subdirectory(test)