production: fix background in search box

Author: Ed Costello

themes/mongodb/static/mongodb-docs.css_t

@@ -648,3 +648,5 @@ div#etp ul li {display:inline;list-style-type:none;font-size:13px;color:#C48C55;
 div#etp ul li a {color:#AA814D}
 div#etp ul li:before {content:"|";padding-right:1em;color:#c48c55}
 div#etp ul li:first-child:before {content:"";}
+
+input.gsc-input {background:none;}