remove node_modules

app/node_modules/bootstrap/scss/mixins/_screen-reader.scss

@@ -1,33 +0,0 @@
-// Only display content to screen readers
-//
-// See: https://a11yproject.com/posts/how-to-hide-content/
-// See: https://hugogiraudel.com/2016/10/13/css-hide-and-seek/
-
-@mixin sr-only {
-  position: absolute;
-  width: 1px;
-  height: 1px;
-  padding: 0;
-  overflow: hidden;
-  clip: rect(0, 0, 0, 0);
-  white-space: nowrap;
-  border: 0;
-}
-
-// Use in conjunction with .sr-only to only display content when it's focused.
-//
-// Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
-//
-// Credit: HTML5 Boilerplate
-
-@mixin sr-only-focusable {
-  &:active,
-  &:focus {
-    position: static;
-    width: auto;
-    height: auto;
-    overflow: visible;
-    clip: auto;
-    white-space: normal;
-  }
-}