remove sample data

api/example_data.go

@@ -1,15 +0,0 @@
-package api
-
-import "time"
-
-var messages = []*Message{
-	{ID: "1", UserID: 1, Body: "hello", Timestamp: time.Now()},
-	{ID: "2", UserID: 2, Body: "world", Timestamp: time.Now()},
-	{ID: "3", UserID: 1, Body: "abababa", Timestamp: time.Now()},
-	{ID: "4", UserID: 2, Body: "bitch", Timestamp: time.Now()},
-}
-
-var users = []*User{
-	{ID: 1, Name: "duby"},
-	{ID: 2, Name: "astolfo"},
-}