refactoring: remove unused billing code (getfider#920)

GUIDELINES.md

@@ -6,7 +6,7 @@
 - `app/models/dto.<something>`: A simple object used for data transfer between various packages/services. E.g: `dto.NewUserInfo`;
 - `app/models/entity.<something>`: An object that is mapped to a database table. E.g: `entity.User`;
 - `app/models/cmd.<something>` something that must be done and potentially return some value. E.g.: `cmd.HttpRequest`, `cmd.LogDebug`, `cmd.SendMail`, `cmd.CreateNewUser`;
-- `app/models/query.<something>` get some information from somewhere. E.g.: `query.GetUserById`, `query.GetBillingStatus`;
+- `app/models/query.<something>` get some information from somewhere. E.g.: `query.GetUserById`, `query.GetAllPosts`;
 
 # UI Development
 

app/cmd/routes.go

@@ -159,14 +159,6 @@ func routes(r *web.Engine) *web.Engine {
 		ui.Post("/_api/admin/roles/:role/users", handlers.ChangeUserRole())
 		ui.Put("/_api/admin/users/:userID/block", handlers.BlockUser())
 		ui.Delete("/_api/admin/users/:userID/block", handlers.UnblockUser())
-
-		ui.Use(middlewares.RequireBillingEnabled())
-
-		ui.Get("/admin/billing", handlers.BillingPage())
-		ui.Get("/_api/admin/billing/plans/:countryCode", handlers.GetBillingPlans())
-		ui.Post("/_api/admin/billing/paymentinfo", handlers.UpdatePaymentInfo())
-		ui.Post("/_api/admin/billing/subscription/:planID", handlers.BillingSubscribe())
-		ui.Delete("/_api/admin/billing/subscription/:planID", handlers.CancelBillingSubscription())
 	}
 
 	api := r.Group()

app/cmd/server.go

@@ -14,7 +14,6 @@ import (
 	"github.com/getfider/fider/app/pkg/log"
 	"github.com/getfider/fider/app/pkg/web"
 
-	_ "github.com/getfider/fider/app/services/billing"
 	_ "github.com/getfider/fider/app/services/blob/fs"
 	_ "github.com/getfider/fider/app/services/blob/s3"
 	_ "github.com/getfider/fider/app/services/blob/sql"