Revert "Fix link color in high-contrast theme, add underlines (mastodon#9949)"

This reverts commit ad8c71c.

Author: masanbol

app/javascript/styles/contrast/diff.scss

@@ -12,54 +12,3 @@
     }
   }
 }
-
-.status__content a,
-.reply-indicator__content a {
-  color: lighten($ui-highlight-color, 12%);
-  text-decoration: underline;
-
-  &.mention {
-    text-decoration: none;
-  }
-
-  &.mention span {
-    text-decoration: underline;
-
-    &:hover,
-    &:focus,
-    &:active {
-      text-decoration: none;
-    }
-  }
-
-  &:hover,
-  &:focus,
-  &:active {
-    text-decoration: none;
-  }
-
-  &.status__content__spoiler-link {
-    color: $secondary-text-color;
-    text-decoration: none;
-  }
-}
-
-.status__content__read-more-button {
-  text-decoration: underline;
-
-  &:hover,
-  &:focus,
-  &:active {
-    text-decoration: none;
-  }
-}
-
-.getting-started__footer a {
-  text-decoration: underline;
-
-  &:hover,
-  &:focus,
-  &:active {
-    text-decoration: none;
-  }
-}

config/locales/en.yml

@@ -929,9 +929,9 @@ en:
       <p>Originally adapted from the <a href="https://github.com/discourse/discourse">Discourse privacy policy</a>.</p>
     title: "%{instance} Terms of Service and Privacy Policy"
   themes:
-    contrast: Mastodon (High contrast)
-    default: Mastodon (Dark)
-    mastodon-light: Mastodon (Light)
+    contrast: High contrast
+    default: Mastodon
+    mastodon-light: Mastodon (light)
   time:
     formats:
       default: "%b %d, %Y, %H:%M"