tree-wide: Do not use package librt and libpthread

The libraries libpthread, libdl, libutil, libanl have been integrated
into the libc library in version 2.34. it is not needed to explicitly
link them any more.

Most of the functions have been moved from the librt.so into libc.so
some time ago already.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/system/ubox/Makefile

@@ -18,12 +18,10 @@ PKG_MAINTAINER:=John Crispin <john@phrozen.org>
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/cmake.mk
 
-TARGET_LDFLAGS += $(if $(CONFIG_USE_GLIBC),-lrt)
-
 define Package/ubox
   SECTION:=base
   CATEGORY:=Base system
-  DEPENDS:=+libubox +ubusd +ubus +libubus +libuci +USE_GLIBC:librt
+  DEPENDS:=+libubox +ubusd +ubus +libubus +libuci
   TITLE:=OpenWrt system helper toolbox
   ALTERNATIVES:=\
     100:/sbin/rmmod:/sbin/kmodloader \
@@ -46,7 +44,7 @@ endef
 define Package/logd
   SECTION:=base
   CATEGORY:=Base system
-  DEPENDS:=+libubox +libubus +libblobmsg-json +USE_GLIBC:librt
+  DEPENDS:=+libubox +libubus +libblobmsg-json
   TITLE:=OpenWrt system log implementation
   USERID:=logd=514:logd=514
 endef