remove cerr debug output (ydb-platform#10321)

Author: adameat

ydb/core/viewer/viewer_autocomplete.h

@@ -138,7 +138,6 @@ class TJsonAutocomplete : public TViewerPipeClient {
     TRequestResponse<TEvTxProxySchemeCache::TEvNavigateKeySetResult> MakeRequestSchemeCacheNavigate() {
         auto request = std::make_unique<NSchemeCache::TSchemeCacheNavigate>();
         for (const TString& path : Paths) {
-            Cerr << "Looking into " << path << Endl;
             NSchemeCache::TSchemeCacheNavigate::TEntry entry;
             entry.Operation = NSchemeCache::TSchemeCacheNavigate::OpList;
             entry.SyncVersion = false;