Hide SSO related messages on login page if user is not in the SSO pipeline.

lms/templates/student_account/login.underscore

 <div class="js-form-feedback" aria-live="assertive" tabindex="-1">
 </div>
 
-<% if ( context.createAccountOption !== false && !context.syncLearnerProfileData && !context.enterpriseName) { %>
+<% if ( context.createAccountOption !== false && !context.syncLearnerProfileData && !(context.enterpriseName && context.currentProvider) ) { %>
 <div class="toggle-form">
     <span class="text"><%- gettext("First time here?") %></span>
     <a href="#login" class="form-toggle" data-type="register"><%- gettext("Create an Account.") %></a>
 </div>
 <% } %>
 
-<% if (context.enterpriseName) { %>
+<% // Hide SSO related messages if we are not in the SSO pipeline.  %>
+<% if (context.enterpriseName && context.currentProvider) { %>
     <% if (context.pipelineUserDetails && context.pipelineUserDetails.email) { %>
         <h2><%- gettext("Sign in to continue learning as {email}").replace("{email}", context.pipelineUserDetails.email) %></h2>
     <% } else { %>