consolidate badge classes to swc.css

the class removed are unused as we take advantage of classes provided by
Bootstrap instead.

css/badge.css

-.badges-section {
-  margin-bottom:30px;
-}
-.badges-section .media {
-  margin-top: 30px;
-}
-h1.badge-title{
-  margin-top: 10px;
-}
-#modal-badge-img {
-  position:absolute;
-  right: 25px;
-  bottom: 25px;
-  opacity: 0.5;
-}
-#assertion-modal.in {
-  color: black;
-}

css/swc.css

@@ -445,6 +445,16 @@ table.workshops td.date {
     opacity: 0.5;
 }
 
+#modal-badge-img {
+  position:absolute;
+  right: 25px;
+  bottom: 25px;
+  opacity: 0.5;
+}
+#assertion-modal.in {
+  color: black;
+}
+
 /* list with checkbox as bullet */
 ul.checklist {
   list-style-image: url('../img/checkbox.png');