Revert "Merge pull request 101888 from kolyshkin/update-runc-rc94"

This reverts commit b1b06fe0a4, reversing
changes made to 382a33986b.

vendor/github.com/cilium/ebpf/link/netns.go

@@ -1,60 +0,0 @@
-package link
-
-import (
-	"fmt"
-
-	"github.com/cilium/ebpf"
-)
-
-// NetNsInfo contains metadata about a network namespace link.
-type NetNsInfo struct {
-	RawLinkInfo
-}
-
-// NetNsLink is a program attached to a network namespace.
-type NetNsLink struct {
-	*RawLink
-}
-
-// AttachNetNs attaches a program to a network namespace.
-func AttachNetNs(ns int, prog *ebpf.Program) (*NetNsLink, error) {
-	var attach ebpf.AttachType
-	switch t := prog.Type(); t {
-	case ebpf.FlowDissector:
-		attach = ebpf.AttachFlowDissector
-	case ebpf.SkLookup:
-		attach = ebpf.AttachSkLookup
-	default:
-		return nil, fmt.Errorf("can't attach %v to network namespace", t)
-	}
-
-	link, err := AttachRawLink(RawLinkOptions{
-		Target:  ns,
-		Program: prog,
-		Attach:  attach,
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &NetNsLink{link}, nil
-}
-
-// LoadPinnedNetNs loads a network namespace link from bpffs.
-func LoadPinnedNetNs(fileName string, opts *ebpf.LoadPinOptions) (*NetNsLink, error) {
-	link, err := LoadPinnedRawLink(fileName, NetNsType, opts)
-	if err != nil {
-		return nil, err
-	}
-
-	return &NetNsLink{link}, nil
-}
-
-// Info returns information about the link.
-func (nns *NetNsLink) Info() (*NetNsInfo, error) {
-	info, err := nns.RawLink.Info()
-	if err != nil {
-		return nil, err
-	}
-	return &NetNsInfo{*info}, nil
-}