Only use .danger for alerts, no more .error

docs/assets/css/bootstrap.css

@@ -4663,22 +4663,18 @@ button.close {
   color: #356635;
 }
 
-.alert-danger,
-.alert-error {
+.alert-danger {
   color: #b94a48;
   background-color: #f2dede;
   border-color: #eed3d7;
 }
 
-.alert-danger hr,
-.alert-error hr {
+.alert-danger hr {
   border-top-color: #e6c1c7;
 }
 
 .alert-danger > a,
-.alert-error > a,
-.alert-danger > p > a,
-.alert-error > p > a {
+.alert-danger > p > a {
   color: #953b39;
 }
 

docs/docs.html

@@ -4246,7 +4246,7 @@ body {
     <h3 id="alerts-alternatives">Contextual alternatives</h3>
     <p>Add optional classes to change an alert's connotation.</p>
     <div class="bs-docs-example">
-      <div class="alert alert-error">
+      <div class="alert alert-danger">
         <button type="button" class="close" data-dismiss="alert">&times;</button>
         <strong>Oh snap!</strong> Change a few things up and try submitting again.
       </div>
@@ -4260,7 +4260,7 @@ body {
       </div>
     </div>
 {% highlight html linenos %}
-<div class="alert alert-error">...</div>
+<div class="alert alert-danger">...</div>
 <div class="alert alert-success">...</div>
 <div class="alert alert-info">...</div>
 {% endhighlight %}

less/alerts.less

@@ -55,8 +55,7 @@
     color: darken(@state-success-text, 10%);
   }
 }
-.alert-danger,
-.alert-error {
+.alert-danger {
   background-color: @state-danger-bg;
   border-color: @state-danger-border;
   color: @state-danger-text;