gnu: xorriso: Remove 'bzip2' and 'libcdio' from inputs.

Thomas Schmitt suggested in bug#28398 to apply these changes. Neither of these
inputs are referenced by the output store item.

* gnu/packages/cdrom.scm (xorriso)[inputs]: Remove 'bzip2' and 'libcdio'.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/packages/cdrom.scm

@@ -161,9 +161,7 @@ libcdio.")
     (inputs
      `(("acl" ,acl)
        ("readline" ,readline)
-       ("bzip2" ,bzip2)
-       ("zlib" ,zlib)
-       ("libcdio" ,libcdio)))
+       ("zlib" ,zlib)))
     (home-page "https://www.gnu.org/software/xorriso/")
     (synopsis "Create, manipulate, burn ISO-9660 file systems")
     (description