Revert "Learner Dashboard improvements to assist with the Account Activation process"

lms/static/sass/multicourse/_dashboard.scss

@@ -1098,7 +1098,7 @@
 .empty-dashboard-message {
   border: 3px solid $gray-l4;
   background: $gray-l6;
-  padding: ($baseline*2) ($baseline/10);
+  padding: ($baseline*2) 0;
   text-align: center;
 
   p {
@@ -1109,12 +1109,7 @@
     text-shadow: 0 1px rgba(255,255,255, 0.6);
   }
 
-  p.custom-message {
-    @include font-size(14);
-    text-shadow: none;
-  }
-
-  a.btn {
+  a {
     background-color: theme-color('primary');
     border: 1px solid theme-color('primary');
     box-shadow: 0 1px 8px 0 $shadow-l1;