[PLT-6936] Translate AppError.Message automatically by default (#8063)

api/context.go

@@ -455,7 +455,6 @@ func IsApiCall(r *http.Request) bool {
 
 func Handle404(w http.ResponseWriter, r *http.Request) {
 	err := model.NewAppError("Handle404", "api.context.404.app_error", nil, "", http.StatusNotFound)
-	err.Translate(utils.T)
 
 	l4g.Debug("%v: code=404 ip=%v", r.URL.Path, utils.GetIpAddress(r))