Simplify emoji rendering (#34048) (#34049)

Backport #34048 by silverwind

Co-authored-by: silverwind <[email protected]>
Co-authored-by: wxiaoguang <[email protected]>

Author: 3 people

web_src/css/base.css

@@ -1225,14 +1225,7 @@ table th[data-sortt-desc] .svg {
   box-shadow: 0 0 0 1px var(--color-secondary) inset;
 }
 
-.emoji {
-  font-size: 1.25em;
-  line-height: var(--line-height-default);
-  font-style: normal !important;
-  font-weight: var(--font-weight-normal) !important;
-  vertical-align: -0.075em;
-}
-
+/* for "image" emojis like ":git:"  ":gitea:" and ":github:" (see CUSTOM_EMOJIS config option) */
 .emoji img {
   border-width: 0 !important;
   margin: 0 !important;

web_src/css/markup/content.css

@@ -337,11 +337,6 @@
   padding-right: 28px;
 }
 
-.markup .emoji {
-  max-width: none;
-  vertical-align: text-top;
-}
-
 .markup span.frame {
   display: block;
   overflow: hidden;