bash completion: rm eval on assigned variable

warning: previous_extglob_setting is referenced but not assigned. [SC2154]

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

completions/bash/skopeo

@@ -203,7 +203,6 @@ _cli_bash_autocomplete() {
      local completions_func=_skopeo_${command}
      declare -F $completions_func >/dev/null && $completions_func
 
-     eval "$previous_extglob_setting"
      return 0
 }