(input_destroy): don't call input_free_completions() twice.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

lib/widget/input.c

@@ -917,7 +917,6 @@ input_destroy (WInput * in)
     g_free (in->history_name);
 
     g_free (in->buffer);
-    input_free_completions (in);
     g_free (in->init_text);
 
     g_free (kill_buffer);