fix(slickvpn/updater): only keep 11 servers

- this reverts most of commit e806fe02db.

internal/provider/common/mocks.go

@@ -92,20 +92,6 @@ func (mr *MockStorageMockRecorder) FilterServers(arg0, arg1 interface{}) *gomock
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "FilterServers", reflect.TypeOf((*MockStorage)(nil).FilterServers), arg0, arg1)
 }
 
-// HardcodedServers mocks base method.
-func (m *MockStorage) HardcodedServers() models.AllServers {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "HardcodedServers")
-	ret0, _ := ret[0].(models.AllServers)
-	return ret0
-}
-
-// HardcodedServers indicates an expected call of HardcodedServers.
-func (mr *MockStorageMockRecorder) HardcodedServers() *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "HardcodedServers", reflect.TypeOf((*MockStorage)(nil).HardcodedServers))
-}
-
 // MockUnzipper is a mock of Unzipper interface.
 type MockUnzipper struct {
 	ctrl     *gomock.Controller

internal/provider/common/storage.go

@@ -8,5 +8,4 @@ import (
 type Storage interface {
 	FilterServers(provider string, selection settings.ServerSelection) (
 		servers []models.Server, err error)
-	HardcodedServers() models.AllServers
 }