update imports in catalog

Catlog API was extracted to a separate crate.

Ref: apache/datafusion#11516

Author: Michael-J-Ward

src/catalog.rs

@@ -25,7 +25,7 @@ use crate::errors::DataFusionError;
 use crate::utils::wait_for_future;
 use datafusion::{
     arrow::pyarrow::ToPyArrow,
-    catalog::{schema::SchemaProvider, CatalogProvider},
+    catalog::{SchemaProvider, CatalogProvider},
     datasource::{TableProvider, TableType},
 };