staticcheck.conf: turn off noisy lint errors

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

tstest/integration/vms/vms_test.go

@@ -803,12 +803,10 @@ func TestDeriveBindhost(t *testing.T) {
 	t.Log(deriveBindhost(t))
 }
 
-//lint:ignore U1000 Xe: used when debugging the virtual machines
 type nopWriteCloser struct {
 	io.Writer
 }
 
-//lint:ignore U1000 Xe: used when debugging the virtual machines
 func (nwc nopWriteCloser) Close() error { return nil }
 
 const metaDataTemplate = `instance-id: {{.ID}}

tstest/natlab/natlab.go

@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//lint:file-ignore U1000 in development
-//lint:file-ignore S1000 in development
-
 // Package natlab lets us simulate different types of networks all
 // in-memory without running VMs or requiring root, etc. Despite the
 // name, it does more than just NATs. But NATs are the most