Remove some unneeded database attributes

app.go

@@ -203,15 +203,9 @@ func Serve() {
 	app.formDecoder.RegisterConverter(sql.NullFloat64{}, converter.ConvertSQLNullFloat64)
 
 	// Check database configuration
-	if app.cfg.Database.User == "" || app.cfg.Database.Password == "" {
-		log.Error("Database user or password not set.")
-		os.Exit(1)
-	}
-	if app.cfg.Database.Host == "" {
-		app.cfg.Database.Host = "localhost"
-	}
 	if app.cfg.Database.Database == "" {
-		app.cfg.Database.Database = "writeas"
+		log.Error("Database filename not set.")
+		os.Exit(1)
 	}
 
 	connectToDatabase(app)

config/config.go

@@ -18,11 +18,7 @@ type (
 
 	DatabaseCfg struct {
 		Type     string `ini:"type"`
-		User     string `ini:"username"`
-		Password string `ini:"password"`
 		Database string `ini:"database"`
-		Host     string `ini:"host"`
-		Port     int    `ini:"port"`
 	}
 
 	AppCfg struct {