iptables: remove metadata struct

Metadata was useful for debugging and safety, but enough tests exist that we
should see failures when (de)serialization is broken. It made stack
initialization more cumbersome and it's also getting in the way of ip6tables.

PiperOrigin-RevId: 317210653

1 files changed, 0 insertions, 8 deletions

diff --git a/pkg/tcpip/stack/iptables.go b/pkg/tcpip/stack/iptables.go
index 4e9b404c8..dc2b77c9d 100644
--- a/pkg/tcpip/stack/iptables.go
+++ b/pkg/tcpip/stack/iptables.go
@@ -173,14 +173,6 @@ func (it *IPTables) ReplaceTable(name string, table Table) {
 	it.tables[name] = table
 }
 
-// ModifyTables acquires write-lock and calls fn with internal name-to-table
-// map. This function can be used to update multiple tables atomically.
-func (it *IPTables) ModifyTables(fn func(map[string]Table)) {
-	it.mu.Lock()
-	defer it.mu.Unlock()
-	fn(it.tables)
-}
-
 // GetPriorities returns slice of priorities associated with hook.
 func (it *IPTables) GetPriorities(hook Hook) []string {
 	it.mu.RLock()