!11 remove unnecessary build require.

From: @zhouwenpei
Reviewed-by: @liuzhiqiang26
Signed-off-by: @liuzhiqiang26

libusbx.spec

@@ -3,7 +3,7 @@
 
 Name:           libusbx
 Version:        1.0.23
-Release:        3
+Release:        4
 Summary:        Library for accessing USB devices
 License:        LGPLv2+
 URL:            http://libusb.info
@@ -18,7 +18,7 @@ Patch6:         0006-core-Fix-libusb_get_max_iso_packet_size-for-superspe.patch
 Patch7:         0007-core-Do-not-attempt-to-destroy-a-default-context-tha.patch
 Patch8:         0008-linux_usbfs-Wait-until-all-URBs-have-been-reaped-bef.patch
 
-BuildRequires:  systemd-devel doxygen libtool gdb
+BuildRequires:  systemd-devel doxygen libtool
 
 %description
 libusb is a library for USB device access from Linux, macOS, Windows, OpenBSD/NetBSD and Haiku userspace. It is written in C (Haiku backend in C++) and licensed under the GNU Lesser General Public License version 2.1 or, at your option, any later version (see COPYING).
@@ -69,6 +69,9 @@ make check
 %{_libdir}/pkgconfig/libusb-1.0.pc
 
 %changelog
+* Fri Jul 23 2021 zhouwenpei <zhouwenpei1@hauwei.com> - 1.0.23-4
+- remove unnecessary build require.
+
 * Wed Nov 4 2020 lixiaokeng <lixiaokeng@hauwei.com> - 1.0.23-3
 - add make check