diff --git a/target/linux/ramips/mt7621/base-files/lib/preinit/07_mt7621_bringup_dsa_master b/target/linux/ramips/mt7621/base-files/lib/preinit/07_mt7621_bringup_dsa_master
deleted file mode 100644
index 0f4660d242..0000000000
--- a/target/linux/ramips/mt7621/base-files/lib/preinit/07_mt7621_bringup_dsa_master
+++ /dev/null
@@ -1,20 +0,0 @@
-. /lib/functions.sh
-
-mt7621_bringup_dsa_master() {
-    local board=$(board_name)
-    local masterif
-
-    case "$board" in
-    ubnt,edgerouter-x|\
-    ubnt,edgerouter-x-sfp)
-        masterif="dsa"
-        ;;
-    *)
-        masterif="eth0"
-        ;;
-    esac
-
-    ip link set $masterif up
-}
-
-boot_hook_add preinit_main mt7621_bringup_dsa_master
\ No newline at end of file