btrfs-progs: remove unused header for tune/main.c

My clangd LSP server reports warning that "common/parse-utils.h" is not
utilized at all.

Just remove it.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: adam900710

tune/main.c

@@ -33,7 +33,6 @@
 #include "common/open-utils.h"
 #include "common/device-scan.h"
 #include "common/messages.h"
-#include "common/parse-utils.h"
 #include "common/string-utils.h"
 #include "common/help.h"
 #include "common/box.h"