[openwrt/openwrt] 6in4: remove 6in4 tunnel delete workaround (FS#3690)

[LEDE Commits]

dedeckeh pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/2d2c7c4250016a34f67b3e62c25f5fcc1a2f07e2

commit 2d2c7c4250016a34f67b3e62c25f5fcc1a2f07e2
Author: Hans Dedecker <dedeckeh at gmail.com>
AuthorDate: Sat Oct 30 21:08:38 2021 +0200

    6in4: remove 6in4 tunnel delete workaround (FS#3690)
    
    Remove 6in4 tunnel delete workaround as the real issue is
    now solved in netifd
    (https://git.openwrt.org/?p=project/netifd.git;a=commit;h=8f82742ca4f47f459284f3a07323d04da72ea5f6)
    
    Signed-off-by: Hans Dedecker <dedeckeh at gmail.com>
---
 package/network/ipv6/6in4/Makefile      | 2 +-
 package/network/ipv6/6in4/files/6in4.sh | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/package/network/ipv6/6in4/Makefile b/package/network/ipv6/6in4/Makefile
index 331295ba7a..edbb7d71a0 100644
--- a/package/network/ipv6/6in4/Makefile
+++ b/package/network/ipv6/6in4/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6in4
-PKG_RELEASE:=27
+PKG_RELEASE:=28
 PKG_LICENSE:=GPL-2.0
 
 include $(INCLUDE_DIR)/package.mk
diff --git a/package/network/ipv6/6in4/files/6in4.sh b/package/network/ipv6/6in4/files/6in4.sh
index d0904952fd..5b5c7b36af 100755
--- a/package/network/ipv6/6in4/files/6in4.sh
+++ b/package/network/ipv6/6in4/files/6in4.sh
@@ -138,8 +138,6 @@ proto_6in4_setup() {
 
 proto_6in4_teardown() {
 	local cfg="$1"
-	local link="6in4-$cfg"
-	ip link del $link
 }
 
 proto_6in4_init_config() {