all: don't repeat the the word "the" unnecessarily

Updates #cleanup

Change-Id: Ic1f430cd5dbf6cc1a385c59074a5d5cabe6fca57
Signed-off-by: Alex Chan <alexc@tailscale.com>

ipn/ipnlocal/local_test.go

@@ -8377,7 +8377,7 @@ func (f *fakeAttestationKey) Clone() key.HardwareAttestationKey {
 // TestStripKeysFromPrefs tests that LocalBackend's [stripKeysFromPrefs] (as used
 // by sendNotify etc) correctly removes all private keys from an ipn.Notify.
 //
-// It does so by testing the the two ways that Notifys are sent: via sendNotify,
+// It does so by testing the two ways that Notifys are sent: via sendNotify,
 // and via extension hooks.
 func TestStripKeysFromPrefs(t *testing.T) {
 	// genNotify generates a sample ipn.Notify with various private keys set

ipn/ipnlocal/state_test.go

@@ -1247,7 +1247,7 @@ func TestEngineReconfigOnStateChange(t *testing.T) {
 	}{
 		{
 			name: "Initial",
-			// The configs are nil until the the LocalBackend is started.
+			// The configs are nil until the LocalBackend is started.
 			wantState:     ipn.NoState,
 			wantCfg:       nil,
 			wantRouterCfg: nil,