diff --git a/release/arm64/ROCKPRO64.conf b/release/arm64/ROCKPRO64.conf
index 29d19bd8a46f..fc454e30ec72 100644
--- a/release/arm64/ROCKPRO64.conf
+++ b/release/arm64/ROCKPRO64.conf
@@ -26,10 +26,3 @@ arm_install_uboot() {
 		of=/dev/${mddev} bs=512 seek=16384 conv=sync
 	return 0
 }
-
-arm_do_quirk() {
-	echo '# Known issue with big.LITTLE' \
-		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
-	echo 'hw.ncpu=4' \
-		>> ${CHROOTDIR}/${DESTDIR}/boot/loader.conf
-}