staticcheck.conf: turn off noisy lint errors

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>

net/dns/manager.go

@@ -20,8 +20,6 @@ import (
 // the lint exception is necessary and on others it is not,
 // and plain ignore complains if the exception is unnecessary.
 
-//lint:file-ignore U1000 reconfigTimeout is used on some platforms but not others
-
 // reconfigTimeout is the time interval within which Manager.{Up,Down} should complete.
 //
 // This is particularly useful because certain conditions can cause indefinite hangs

net/dns/nm.go

@@ -4,8 +4,6 @@
 
 // +build linux
 
-//lint:file-ignore U1000 refactoring, temporarily unused code.
-
 package dns
 
 import (

net/dns/resolved.go

@@ -4,8 +4,6 @@
 
 // +build linux
 
-//lint:file-ignore U1000 refactoring, temporarily unused code.
-
 package dns
 
 import (

net/portmapper/portmapper.go

@@ -577,8 +577,6 @@ func pcpAnnounceRequest(myIP netaddr.IP) []byte {
 	return pkt
 }
 
-//lint:ignore U1000 moved this code from netcheck's old PCP probing; will be needed when we add PCP mapping
-
 // pcpMapRequest generates a PCP packet with a MAP opcode.
 func pcpMapRequest(myIP netaddr.IP, mapToLocalPort int, delete bool) []byte {
 	const udpProtoNumber = 17