Remove a unused lightbox

app/partials/user-profile.jade

@@ -61,6 +61,3 @@ block content
                                      ng-click="ctrl.openDeleteLightbox()") Delete Taiga account
 
     div.lightbox.lightbox-delete-account.hidden(tg-lb-delete-user)
-
-    div.lightbox.lightbox-confirm-use-gravatar.hidden
-        include views/modules/lightbox-use-gravatar

app/partials/views/modules/lightbox-use-gravatar.jade

@@ -1,11 +0,0 @@
-a.close(href="", title="close")
-    span.icon.icon-delete
-form
-    h2.title Use gravatar as image
-    p
-        span.subtitle You really want to delete your current photo and use the gravatar image?
-    div.options
-        a.button.button-green(href="", title="Accept")
-            span Accept
-        a.button.button-red(href="", title="Delete")
-            span Cancel

app/styles/modules/common/lightbox.scss

@@ -310,33 +310,6 @@
     }
 }
 
-.lightbox-confirm-use-gravatar {
-    form {
-        @include table-flex-child(0, 420px, 0, 420px);
-    }
-    .question,
-    .subtitle {
-        display: block;
-        line-height: 2rem;
-        text-align: center;
-    }
-    .subtitle {
-        @extend %large;
-        @extend %title;
-    }
-    .options {
-        @include table-flex();
-        a {
-            @include table-flex-child(1, 0, 0);
-            padding: 8px 0;
-            text-align: center;
-            &:first-child {
-                margin-right: .5rem;
-            }
-        }
-    }
-}
-
 .lightbox-delete-account {
     form {
         @include table-flex-child(0, 420px, 0, 420px);