Fix blank white line below footer. (circleci#2057)

Author: FelicianoTech

jekyll/assets/css/main.scss

@@ -345,3 +345,8 @@ code {
 	display: grid;
 	grid-template-columns: 50% 50%;
 }
+
+/* A fix for https://github.com/circleci/circleci-docs/issues/1978 */
+body > img:last-of-type{
+	display: none;
+}