PHRAS-4067: admin - dashboard - 500 error (#4513)

* fix error 500 on dashboard : remove unused swiftools requirement

* unused

* patch on 4.1.8

lib/conf.d/configuration.yml

@@ -89,9 +89,6 @@ main:
     binaries:
         ghostscript_binary: null
         php_binary: null
-        swf_extract_binary: null
-        pdf2swf_binary: null
-        swf_render_binary: null
         unoconv_binary: null
         ffmpeg_binary: null
         ffprobe_binary: null