fix https://github.com/b3log/solo/issues/12673

Pinghsu/css/_icon.scss

@@ -20,37 +20,8 @@
  * icon font
  *
  * @author <a href="http://vanessa.b3log.org">Liyuan Li</a>
- * @version 0.2.0.1, Jan 2, 2019
+ * @version 0.1.0.0, Feb 27, 2019
 */
-@font-face {
-  font-family: 'icomoon';
-  src: url('fonts/icomoon.eot?oyqnlj');
-  src: url('fonts/icomoon.eot?oyqnlj#iefix') format('embedded-opentype'),
-  url('fonts/icomoon.ttf?oyqnlj') format('truetype'),
-  url('fonts/icomoon.woff?oyqnlj') format('woff'),
-  url('fonts/icomoon.svg?oyqnlj#icomoon') format('svg');
-  font-weight: normal;
-  font-style: normal;
-}
-
-[class^="icon__"], [class*=" icon__"] {
-  /* use !important to prevent issues with browser extensions that change fonts */
-  font-family: 'icomoon' !important;
-  speak: none;
-  font-style: normal;
-  font-weight: normal;
-  font-variant: normal;
-  text-transform: none;
-  line-height: 1;
-
-  /* Better Font Rendering =========== */
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-.icon__search:before {
-  content: "\f002";
-}
 
 .ico {
   background-image: url("../images/ico.png");
@@ -90,4 +61,9 @@
   &--9 {
     background-position: 0 -420px;
   }
+}
+
+svg {
+  height: 20px;
+  width: 20px;
 }