Remove redundant system message check
Remove redundant system message check

Chatnbook/react-native-gifted-chat,FaridSafi/react-native-gifted-messenger,atFriendly/react-native-friendly-chat,ianlin/react-native-gifted-messenger,atFriendly/react-native-friendly-chat,ianlin/react-native-gifted-messenger,atFriendly/react-native-friendly-chat,Chatnbook/react-native-gifted-chat,FaridSafi/react-native-gifted-chat,atFriendly/react-native-friendly-chat,Chatnbook/react-native-gifted-chat,FaridSafi/react-native-gifted-messenger,FaridSafi/react-native-gifted-chat