Replace zen grids with css grid. Move print styles print style file. Remove Drupal specific styles.

sass/base/forms/_forms.scss

@@ -45,10 +45,6 @@ select {
 // Show the overflow in Edge.
 input {
   overflow: visible;
-  @if support-for(firefox, 29) {
-    // Firefox sets `line-height` using `!important` in the UA stylesheet.
-    line-height: normal;
-  }
 }
 
 // Correct the cursor style of increment and decrement buttons in Chrome.
@@ -196,7 +192,6 @@ legend {
 // Style guide: forms.base.label
 
 label {
-  // Drupal-style form labels.
   display: block;
   font-weight: bold;
 }

sass/base/links/_links.scss

@@ -49,25 +49,3 @@ a:active,
 a:hover {
   outline-width: 0;
 }
-
-@media print {
-  // Underline all links.
-  :link,
-  :visited {
-    text-decoration: underline;
-  }
-
-  // Add visible URL after links.
-  a[href]::after {
-    content: ' (' attr(href) ')';
-    font-weight: normal;
-    font-size: $base-font-size;
-    text-decoration: none;
-  }
-
-  // Only display useful links.
-  a[href^='javascript:']::after,
-  a[href^='#']::after {
-    content: '';
-  }
-}

sass/base/text/_text.scss

@@ -21,13 +21,6 @@ abbr[title] {
   // Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
   text-decoration: underline;
   text-decoration: underline dotted;
-
-  @media print {
-    // Add visible title after abbreviations.
-    &::after {
-      content: ' (' attr(title) ')';
-    }
-  }
 }
 
 // Bold