Fix blog post negative margin

Since the featured image is not used anymore the negative margin for blog post content is not required anymore.

Author: geoffguillain

themes/osi/assets/css/editor-style.css

@@ -66,7 +66,6 @@
     .post .post--content {
         background-color: $Nwhite;
         // box-shadow: 0px -3px 5px rgba( #{$Ndark_RGB}, 0.1 );
-        margin-top: -350px;
         max-width: $postMax;
         margin-left: auto;
         margin-right: auto;