all: Revert the underscore sillyness

lib/discover/cache_test.go

@@ -96,7 +96,7 @@ func TestCacheSlowLookup(t *testing.T) {
 	// Start a lookup, which will take at least a second
 
 	t0 := time.Now()
-	go func() { _, _ = c.Lookup(protocol.LocalDeviceID) }()
+	go c.Lookup(protocol.LocalDeviceID)
 	<-started // The slow lookup method has been called so we're inside the lock
 
 	// It should be possible to get ChildErrors while it's running

lib/discover/global_test.go

@@ -242,7 +242,7 @@ func (s *fakeDiscoveryServer) handler(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(204)
 	} else {
 		w.Header().Set("Content-Type", "application/json")
-		_, _ = w.Write([]byte(`{"addresses":["tcp://192.0.2.42::22000"], "relays":[{"url": "relay://192.0.2.43:443", "latency": 42}]}`))
+		w.Write([]byte(`{"addresses":["tcp://192.0.2.42::22000"], "relays":[{"url": "relay://192.0.2.43:443", "latency": 42}]}`))
 	}
 }