[simple theme] use default font and font-size in info page

searx/static/themes/simple/src/less/info.less

@@ -1,10 +1,6 @@
 .info-page {
-  font-family: sans-serif;
-  font-size: 1.3em;
-
   code {
     font-family: monospace;
-    font-size: 1.3em;
     color: var(--color-doc-code);
     background-color: var(--color-doc-code-background);
     padding: 2px 5px;