Remove unused container

- Removes an unused container from
the partial and cleans up JS code

app/assets/javascripts/mirrors/ssh_mirror.js

@@ -22,7 +22,6 @@ export default class SSHMirror {
     this.$dropdownAuthType = this.$form.find('.js-mirror-auth-type');
     this.$hiddenAuthType = this.$form.find('.js-hidden-mirror-auth-type');
 
-    this.$wellAuthTypeChanging = this.$form.find('.js-well-changing-auth');
     this.$wellPasswordAuth = this.$form.find('.js-well-password-auth');
   }
 

app/views/projects/mirrors/_authentication_method.html.haml

@@ -11,8 +11,6 @@
     = f.hidden_field :auth_method, value: "password", class: "js-hidden-mirror-auth-type"
 
 .form-group
-  .collapse.js-well-changing-auth
-    .changing-auth-method
   .well-password-auth.collapse.js-well-password-auth
     = f.label :password, _("Password"), class: "label-bold"
     = f.password_field :password, value: mirror.password, class: 'form-control qa-password', autocomplete: 'new-password'

ee/app/assets/stylesheets/pages/projects.scss

@@ -40,11 +40,6 @@
       text-decoration: line-through;
     }
   }
-
-  .changing-auth-method {
-    display: flex;
-    justify-content: center;
-  }
 }
 
 .load-wrapper {