store: Do not map the subgraph_features table

It's only maintained in the primary, and there's no point in mapping it
across shards

Author: lutter

store/postgres/src/connection_pool.rs

@@ -52,7 +52,6 @@ const SHARDED_TABLES: [(&str, &[&str]); 2] = [
             "dynamic_ethereum_contract_data_source",
             "subgraph_deployment",
             "subgraph_error",
-            "subgraph_features",
             "subgraph_manifest",
             "table_stats",
         ],