TC layout: fix for layout height

Author: vas3a

src-ts/tools/learn/free-code-camp/FreeCodeCamp.module.scss

@@ -8,7 +8,6 @@
 .main-wrap {
     height: calc($content-height - $breadcrumb-height);
     width: 100%;
-    margin-bottom: -$space-lg;
     background: $tc-white;
 
     display: flex;