- remove useless legacy codes.

- refactor models

business/model/legacymodel/blackclient.go

@@ -0,0 +1,12 @@
+package legacymodel
+
+import "time"
+
+type BlackClient struct {
+	ID        int       `orm:"column(id)"`
+	Mobile    string    `orm:"size(16);unique"`
+	Name      string    `orm:"size(8)"`
+	Note      string    `orm:"size(256)"`
+	CreatedAt time.Time `orm:"auto_now_add;type(datetime);null"`
+	UpdatedAt time.Time `orm:"auto_now;type(datetime);null"`
+}