net: remove unused linknames

errNoSuchInterface:
SagerNet/sing@a333493

defaultNS:
MetaCubeX/mihomo@4a16d22

For #67401

Change-Id: I2945bc5edf8a474315283c57259ba6c2a0b85776
Reviewed-on: https://go-review.googlesource.com/c/go/+/721161
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Mark Freeman <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: seankhliao

src/net/dnsconfig.go

@@ -18,7 +18,6 @@ import (
 // Notable members of the hall of shame include:
 //   - github.com/pojntfx/hydrapp/hydrapp
 //   - github.com/mtibben/androiddnsfix
-//   - github.com/metacubex/mihomo
 //
 // Do not remove or change the type signature.
 // See go.dev/issue/67401.

src/net/interface.go

@@ -18,16 +18,6 @@ import (
 // BUG(mikio): On AIX, DragonFly BSD, NetBSD, OpenBSD, Plan 9 and
 // Solaris, the MulticastAddrs method of Interface is not implemented.
 
-// errNoSuchInterface should be an internal detail,
-// but widely used packages access it using linkname.
-// Notable members of the hall of shame include:
-//   - github.com/sagernet/sing
-//
-// Do not remove or change the type signature.
-// See go.dev/issue/67401.
-//
-//go:linkname errNoSuchInterface
-
 var (
 	errInvalidInterface         = errors.New("invalid network interface")
 	errInvalidInterfaceIndex    = errors.New("invalid network interface index")