style: fix download attestation button in dark mode

app/assets/images/icons/download-white.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="16" height="20" viewBox="0 0 16 20"><g fill="none" fill-rule="evenodd"><path d="M11.5 8H15l-7 7-7-7h3.5V1h7zM1 19h14" stroke="#FFF" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/><path d="M-4-2h24v24H-4z"/></g></svg>

app/assets/stylesheets/icons.scss

@@ -51,10 +51,6 @@
     background-image: image-url("icons/download.svg");
   }
 
-  &.download-white {
-    background-image: image-url("icons/download-white.svg");
-  }
-
   &.lock {
     background-image: image-url("icons/lock.svg");
   }

app/assets/stylesheets/patron.scss

@@ -4,9 +4,4 @@
   .patron-section {
     margin-bottom: 20px;
   }
-
-  .icon.download-white {
-    background-color: $blue-france-500;
-    box-shadow: 0px 0px 1px 2px $blue-france-500;
-  }
 }

app/views/root/patron.html.haml

@@ -25,7 +25,6 @@
     %span.icon.preview
     %span.icon.retry
     %span.icon.download
-    %span.icon.download-white
     %span.icon.frown
     %span.icon.meh
     %span.icon.smile

app/views/users/dossiers/show/_status_overview.html.haml

@@ -68,8 +68,7 @@
 
           - if dossier.attestation.present?
             .action
-              = link_to attestation_dossier_path(dossier), target: '_blank', rel: 'noopener', class: 'button primary' do
-                %span.icon.download-white
+              = link_to attestation_dossier_path(dossier), class: "fr-btn fr-icon-download-line fr-btn--icon-left", target: '_blank', rel: 'noopener' do
                 = t('views.users.dossiers.show.status_overview.accepte_attestation')