remove external libraries from main branch

include/lib/ArduinoJson.h

include/lib/ArduinoJson/Configuration.hpp

include/lib/ArduinoJson/Data/Encoding.hpp

include/lib/ArduinoJson/Data/JsonBufferAllocated.hpp

include/lib/ArduinoJson/Data/JsonFloat.hpp

include/lib/ArduinoJson/Data/JsonInteger.hpp

include/lib/ArduinoJson/Data/JsonVariantAs.hpp

include/lib/ArduinoJson/Data/JsonVariantContent.hpp

include/lib/ArduinoJson/Data/JsonVariantDefault.hpp

include/lib/ArduinoJson/Data/JsonVariantType.hpp

include/lib/ArduinoJson/Data/List.hpp

include/lib/ArduinoJson/Data/ListConstIterator.hpp

include/lib/ArduinoJson/Data/ListIterator.hpp

include/lib/ArduinoJson/Data/ListNode.hpp

include/lib/ArduinoJson/Data/NonCopyable.hpp

include/lib/ArduinoJson/Data/ReferenceType.hpp

include/lib/ArduinoJson/Data/ValueSaver.hpp

include/lib/ArduinoJson/Deserialization/Comments.hpp

include/lib/ArduinoJson/Deserialization/JsonParser.hpp

include/lib/ArduinoJson/Deserialization/JsonParserImpl.hpp