Revert "bpftool: Mount bpffs when pinmaps path not under the bpffs"

This reverts commit 65dd9cbafe which is
commit da5f8fd1f0 upstream.

It breaks the build, so should be dropped.

Reported-by: Salvatore Bonaccorso <carnil@debian.org>
Link: https://lore.kernel.org/r/ZrSe8gZ_GyFv1knq@eldamar.lan
Cc: Tao Chen <chen.dylane@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Quentin Monnet <qmo@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/bpf/bpftool/prog.c

@@ -1707,10 +1707,6 @@ static int load_with_options(int argc, char **argv, bool first_prog_only)
 	}
 
 	if (pinmaps) {
-		err = create_and_mount_bpffs_dir(pinmaps);
-		if (err)
-			goto err_unpin;
-
 		err = bpf_object__pin_maps(obj, pinmaps);
 		if (err) {
 			p_err("failed to pin all maps");