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

This reverts commit a70c33a68e, reversing
changes made to f515f9c03a.

lib/ArduinoJson/test/StaticJsonBuffer/startString.cpp

@@ -1,49 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#include <ArduinoJson.h>
-#include <catch.hpp>
-
-using namespace ArduinoJson::Internals;
-
-TEST_CASE("StaticJsonBuffer::startString()") {
-  SECTION("WorksWhenBufferIsBigEnough") {
-    StaticJsonBuffer<6> jsonBuffer;
-
-    StaticJsonBufferBase::String str = jsonBuffer.startString();
-    str.append('h');
-    str.append('e');
-    str.append('l');
-    str.append('l');
-    str.append('o');
-
-    REQUIRE(std::string("hello") == str.c_str());
-  }
-
-  SECTION("ReturnsNullWhenTooSmall") {
-    StaticJsonBuffer<5> jsonBuffer;
-
-    StaticJsonBufferBase::String str = jsonBuffer.startString();
-    str.append('h');
-    str.append('e');
-    str.append('l');
-    str.append('l');
-    str.append('o');
-
-    REQUIRE(0 == str.c_str());
-  }
-
-  SECTION("SizeIncreases") {
-    StaticJsonBuffer<5> jsonBuffer;
-
-    StaticJsonBufferBase::String str = jsonBuffer.startString();
-    REQUIRE(0 == jsonBuffer.size());
-
-    str.append('h');
-    REQUIRE(1 == jsonBuffer.size());
-
-    str.c_str();
-    REQUIRE(2 == jsonBuffer.size());
-  }
-}