Remove orphan CSS selectors in phui/phui-lightbox.css

Summary:
* `lightbox-download-form`
** Usage removed in https://we.phorge.it/rPa2fdf14275f932fcf70baf345ec2d944ffbd5a45

Test Plan: Grep the code for each CSS selector (`grep --exclude="*.css" -R 'some-search-string' .`), also do partial searches, get no results.

Reviewers: O1 Blessed Committers, valerio.bozzolan

Reviewed By: O1 Blessed Committers, valerio.bozzolan

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D26015

resources/celerity/map.php

@@ -9,7 +9,7 @@ return array(
   'names' => array(
     'conpherence.pkg.css' => '79a197f6',
     'conpherence.pkg.js' => '020aebcf',
-    'core.pkg.css' => '42c4119d',
+    'core.pkg.css' => 'dc645c82',
     'core.pkg.js' => '086da722',
     'dark-console.pkg.js' => '187792c2',
     'differential.pkg.css' => '91ac6214',
@@ -163,7 +163,7 @@ return array(
     'rsrc/css/phui/phui-info-view.css' => 'a10a909b',
     'rsrc/css/phui/phui-invisible-character-view.css' => 'c694c4a4',
     'rsrc/css/phui/phui-left-right.css' => '68513c34',
-    'rsrc/css/phui/phui-lightbox.css' => '4ebf22da',
+    'rsrc/css/phui/phui-lightbox.css' => 'e4015eff',
     'rsrc/css/phui/phui-list.css' => 'ccf73664',
     'rsrc/css/phui/phui-object-box.css' => 'b8d7eea0',
     'rsrc/css/phui/phui-pager.css' => 'd022c7ad',
@@ -856,7 +856,7 @@ return array(
     'phui-inline-comment-view-css' => 'bcbaff3d',
     'phui-invisible-character-view-css' => 'c694c4a4',
     'phui-left-right-css' => '68513c34',
-    'phui-lightbox-css' => '4ebf22da',
+    'phui-lightbox-css' => 'e4015eff',
     'phui-list-view-css' => 'ccf73664',
     'phui-object-box-css' => 'b8d7eea0',
     'phui-oi-big-ui-css' => 'fa74cc35',

webroot/rsrc/css/phui/phui-lightbox.css

@@ -134,11 +134,6 @@
   display: block;
 }
 
-.lightbox-attachment .lightbox-status .lightbox-download
-  .lightbox-download-form {
-    display: inline;
-}
-
 .lightbox-attachment a.lightbox-download,
 .lightbox-attachment a.lightbox-comment,
 .lightbox-attachment a.lightbox-close {