theme uninstall add

resources/custom/scss/bootstrap/bootstrap-grid.scss

@@ -1,29 +0,0 @@
-/*!
- * Bootstrap Grid v4.3.1 (https://getbootstrap.com/)
- * Copyright 2011-2019 The Bootstrap Authors
- * Copyright 2011-2019 Twitter, Inc.
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
- */
-
-html {
-  box-sizing: border-box;
-  -ms-overflow-style: scrollbar;
-}
-
-*,
-*::before,
-*::after {
-  box-sizing: inherit;
-}
-
-@import "functions";
-@import "variables";
-
-@import "mixins/breakpoints";
-@import "mixins/grid-framework";
-@import "mixins/grid";
-
-@import "grid";
-@import "utilities/display";
-@import "utilities/flex";
-@import "utilities/spacing";