Return empty list of channels when requesting more channels at the end of cursor (#21557)

app/channel.go

@@ -1876,15 +1876,8 @@ func (a *App) GetChannelsForTeamForUser(c request.CTX, teamID string, userID str
 func (a *App) GetChannelsForTeamForUserWithCursor(c request.CTX, teamID string, userID string, opts *model.ChannelSearchOpts, afterChannelID string) (model.ChannelList, *model.AppError) {
 	list, err := a.Srv().Store().Channel().GetChannelsWithCursor(teamID, userID, opts, afterChannelID)
 	if err != nil {
-		var nfErr *store.ErrNotFound
-		switch {
-		case errors.As(err, &nfErr):
-			return nil, model.NewAppError("GetChannelsForUser", "app.channel.get_channels.not_found.app_error", nil, "", http.StatusNotFound).Wrap(err)
-		default:
-			return nil, model.NewAppError("GetChannelsForUser", "app.channel.get_channels.get.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
-		}
+		return nil, model.NewAppError("GetChannelsForUser", "app.channel.get_channels.get.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
 	}
-
 	return list, nil
 }