Remove unnecessary name copies

packages/rocketchat-lib/server/functions/addUserToRoom.js

server/methods/addRoomModerator.js

server/methods/addRoomOwner.js

server/methods/createDirectMessage.js

server/methods/muteUserInRoom.js

server/methods/removeRoomModerator.js

server/methods/removeRoomOwner.js

server/methods/removeUserFromRoom.js

server/methods/unmuteUserInRoom.js