tools: remove xxd package

It shouldn't be needed anymore as we've now `scripts/xxdi.pl`, which
should be self contained and fully compatible `xxd -i` replacement.

Fixes: #10555
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit 88c9056)

tools/Makefile

@@ -25,7 +25,7 @@ tools-y += autoconf autoconf-archive automake bc bison cmake dosfstools
 tools-y += e2fsprogs fakeroot findutils firmware-utils flex gengetopt
 tools-y += libressl libtool lzma m4 make-ext4fs missing-macros mkimage
 tools-y += mklibs mm-macros mtd-utils mtools padjffs2 patch-image
-tools-y += patchelf pkgconf quilt squashfskit4 sstrip xxd zip zlib zstd
+tools-y += patchelf pkgconf quilt squashfskit4 sstrip zip zlib zstd
 tools-$(BUILD_B43_TOOLS) += b43-tools
 tools-$(BUILD_ISL) += isl
 tools-$(BUILD_TOOLCHAIN) += expat gmp libelf mpc mpfr