fix(api): gofmt + revive cleanup on lidarr search handler

internal/api/lidarr.go

@@ -135,4 +135,3 @@ func (h *handlers) lidarrInLibrary(ctx context.Context, kind, mbid string) (bool
 	}
 	return exists, nil
 }
-

internal/api/lidarr_test.go

@@ -53,7 +53,7 @@ func lidarrArtistStubBody(mbid, name string) string {
 // with 200 OK for any /api/v1/* path.
 func newLidarrStub(t *testing.T, body string) *httptest.Server {
 	t.Helper()
-	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 		_, _ = w.Write([]byte(body))