chore: Remove bourbon dependancy (#5215)

app/javascript/widget/assets/scss/_variables.scss

@@ -65,8 +65,8 @@ $spinkit-size: 1.6rem !default;
 $woot-snackbar-bg: #323232;
 $woot-snackbar-button: #ffeb3b;
 
-$swift-ease-out-duration: .4s !default;
-$swift-ease-out-timing-function: cubic-bezier(.25, .8, .25, 1) !default;
+$swift-ease-out-duration: 0.4s !default;
+$swift-ease-out-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1) !default;
 $swift-ease-out: all $swift-ease-out-duration $swift-ease-out-timing-function !default;
 
 $border-radius: 0.1875px;
@@ -74,20 +74,8 @@ $line-height: 1;
 $footer-height: 11.2rem;
 $header-expanded-height: $space-medium * 10;
 
-$font-family: 'Inter',
--apple-system,
-system-ui,
-BlinkMacSystemFont,
-"Segoe UI",
-Roboto,
-"Helvetica Neue",
-Tahoma,
-Arial,
-sans-serif;
+$font-family: 'Inter', -apple-system, system-ui, BlinkMacSystemFont, 'Segoe UI',
+  Roboto, 'Helvetica Neue', Tahoma, Arial, sans-serif;
 
 // Break points
 $break-point-medium: 667px;
-
-// Timing functions
-
-$ease-in-cubic: cubic-bezier(.17, .67, .83, .67);