[chore/backend] remove mocks

backend/internal/service/mock/mock.go

@@ -1,3 +0,0 @@
-package mock
-
-//go:generate mockgen -source=../service.go -destination=mock_service.go -package=mock

backend/internal/service/service.go

@@ -1,7 +1,5 @@
 package service
 
-//go:generate mockgen -source=service.go -destination=mock/mock_service.go -package=mock
-
 import (
     "context"
     "io"

backend/internal/storage/storage.go

@@ -1,7 +1,5 @@
 package storage
 
-//go:generate mockgen -source=storage.go -destination=mock/mock_storage.go -package=mock
-
 import (
     "context"
     "io"