Fix comments and remove unneeded fields

fileTransfer2/e2e/listener.go

fileTransfer2/e2e/send.go

fileTransfer2/e2e/wrapper.go

fileTransfer2/groupChat/processor.go

fileTransfer2/groupChat/send.go

fileTransfer2/groupChat/wrapper.go

fileTransfer2/interface.go

fileTransfer2/manager.go

fileTransfer2/manager_test.go

groupChat/groupStore/store.go

groupChat/groupStore/store_test.go

groupChat/makeGroup_test.go

groupChat/manager.go

groupChat/manager_test.go

groupChat/messageReceive.go

groupChat/messageReceive_test.go

groupChat/receive.go

groupChat/receiveRequest_test.go

groupChat/sendRequests_test.go

groupChat/send_test.go