drop unmaintained packages

package/ltq-kpi2udp/Makefile

package/ltq-kpi2udp/patches/100-configure.patch

package/ltq-kpi2udp/patches/110-ifx_udp_redirect.patch

package/ltq-tapidemo/Config.in

package/ltq-tapidemo/Makefile

package/ltq-tapidemo/files/bringup_tapidemo

package/ltq-tapidemo/patches/100-ifxmips.patch

package/ltq-tapidemo/patches/110-filename.patch

package/owsip/Makefile

package/owsip/files/telephony.conf

package/owsip/files/telephony.defaults

package/owsip/files/telephony.init

package/pjsip/Makefile

package/pjsip/patches/0001-configure-fixup.patch

package/pjsip/patches/0002-register-tapi.patch

...3-adds-PJ_DEF-pj_status_t-pjsua_add_snd_port-int-id.patch

package/uboot-lantiq/Makefile

package/uboot-lantiq/arcadyan_psc166_32.conf

package/uboot-lantiq/arcadyan_psc166_64.conf

package/uboot-lantiq/easy50712_DDR166M.conf