Refactor: remove un-needed SSH key modal

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

-.modal.js-regenerate-public-ssh-key-confirm-modal{ tabindex: -1 }
-  .modal-dialog
-    .modal-content
-      .modal-header
-        %h3.modal-title.page-title
-          Regenerate public SSH key?
-        %button.close.js-cancel{ type: 'button', 'data-dismiss': 'modal', 'aria-label' => _('Close') }
-          %span{ 'aria-hidden': true } ×
-      .modal-body
-        %p= _('Are you sure you want to regenerate the public key? You will have to update the public key on the remote server before mirroring will work again.')
-      .form-actions.modal-footer
-        = button_tag _('Cancel'), type: 'button', class: 'btn gl-button js-cancel'
-        = button_tag _('Regenerate key'), type: 'button', class: 'btn gl-button btn-inverted btn-warning js-confirm'

locale/gitlab.pot

@@ -4619,9 +4619,6 @@ msgstr ""
 msgid "Are you sure you want to re-deploy this environment?"
 msgstr ""
 
-msgid "Are you sure you want to regenerate the public key? You will have to update the public key on the remote server before mirroring will work again."
-msgstr ""
-
 msgid "Are you sure you want to reindex?"
 msgstr ""
 
@@ -28855,9 +28852,6 @@ msgstr ""
 msgid "Regenerate instance ID"
 msgstr ""
 
-msgid "Regenerate key"
-msgstr ""
-
 msgid "Regenerate recovery codes"
 msgstr ""