refactor(Utilities): revert deprecated utilities and variables

Author: mrholek

scss/_root.scss

@@ -93,6 +93,14 @@
   --#{$prefix}tertiary-color-rgb-dark: #{to-rgb($body-tertiary-color-dark)};
   --#{$prefix}tertiary-bg-dark: #{$body-tertiary-bg-dark};
   --#{$prefix}tertiary-bg-rgb-dark: #{to-rgb($body-tertiary-bg-dark)};
+
+  --#{$prefix}high-emphasis: #{$high-emphasis}; // Deprecated in v5.0.0
+  --#{$prefix}medium-emphasis: #{$medium-emphasis}; // Deprecated in v5.0.0
+  --#{$prefix}disabled: #{$disabled}; // Deprecated in v5.0.0
+
+  --#{$prefix}high-emphasis-inverse: #{$high-emphasis-inverse}; // Deprecated in v5.0.0
+  --#{$prefix}medium-emphasis-inverse: #{$medium-emphasis-inverse}; // Deprecated in v5.0.0
+  --#{$prefix}disabled-inverse: #{$disabled-inverse}; // Deprecated in v5.0.0
   // scss-docs-end root-body-variables
 
   --#{$prefix}heading-color: #{$headings-color};
@@ -170,6 +178,10 @@
     --#{$prefix}tertiary-bg: #{$body-tertiary-bg-dark};
     --#{$prefix}tertiary-bg-rgb: #{to-rgb($body-tertiary-bg-dark)};
 
+    --#{$prefix}high-emphasis: #{$high-emphasis-dark}; // Deprecated in v5.0.0
+    --#{$prefix}medium-emphasis: #{$medium-emphasis-dark}; // Deprecated in v5.0.0
+    --#{$prefix}disabled: #{$disabled-dark}; // Deprecated in v5.0.0
+
     @each $color, $value in $theme-colors-dark {
       --#{$prefix}#{$color}: #{$value};
     }

scss/_variables-dark.scss

@@ -35,6 +35,12 @@ $grays-dark: (
 // scss-docs-end gray-colors-dark-map
 // fusv-enable
 
+// fusv-disable
+$high-emphasis-dark:    rgba($white, .87) !default; // Deprecated in v5.0.0
+$medium-emphasis-dark:  rgba($white, .6) !default; // Deprecated in v5.0.0
+$disabled-dark:         rgba($white, .38) !default; // Deprecated in v5.0.0
+// fusv-enable
+
 // scss-docs-start theme-color-dark-variables
 $primary-dark:       desaturate($primary, 10%) !default;
 $secondary-dark:     desaturate($secondary, 10%) !default;

scss/_variables.scss

@@ -36,6 +36,16 @@ $grays: (
 // scss-docs-end gray-colors-map
 // fusv-enable
 
+// fusv-disable
+$high-emphasis:            rgba(shift-color($gray-base, +26%), .95) !default; // Deprecated in 5.0.0
+$medium-emphasis:          rgba(shift-color($gray-base, +26%), .681) !default; // Deprecated in 5.0.0
+$disabled:                 rgba(shift-color($gray-base, +26%), .38) !default; // Deprecated in 5.0.0
+
+$high-emphasis-inverse:    rgba($white, .87) !default; // Deprecated in 5.0.0
+$medium-emphasis-inverse:  rgba($white, .6) !default; // Deprecated in 5.0.0
+$disabled-inverse:         rgba($white, .38) !default; // Deprecated in 5.0.0
+// fusv-enable
+
 // scss-docs-start color-variables
 $blue:    #0d6efd !default;
 $indigo:  #6610f2 !default;