refactor: remove unused extract_table_provider function to streamline code

Author: kosiew

src/utils.rs

@@ -16,11 +16,8 @@
 // under the License.
 
 use crate::{
-    catalog::PyTable,
     common::data_type::PyScalarValue,
-    dataframe::PyDataFrame,
     errors::{py_datafusion_err, PyDataFusionError, PyDataFusionResult},
-    table::PyTableProvider,
     TokioRuntime,
 };
 use datafusion::{
@@ -144,28 +141,6 @@ pub(crate) fn table_provider_from_pycapsule(
     }
 }
 
-pub(crate) fn extract_table_provider(
-    py_obj: &Bound<PyAny>,
-) -> PyResult<Option<Arc<dyn TableProvider>>> {
-    if let Ok(py_table) = py_obj.extract::<PyTable>() {
-        return Ok(Some(py_table.table()));
-    }
-
-    if let Ok(py_provider) = py_obj.extract::<PyTableProvider>() {
-        return Ok(Some(py_provider.into_inner()));
-    }
-
-    if py_obj.extract::<PyDataFrame>().is_ok() {
-        return Err(PyDataFusionError::Common(EXPECTED_PROVIDER_MSG.to_string()).into());
-    }
-
-    if let Some(provider) = table_provider_from_pycapsule(py_obj)? {
-        return Ok(Some(provider));
-    }
-
-    Ok(None)
-}
-
 pub(crate) fn py_obj_to_scalar_value(py: Python, obj: PyObject) -> PyResult<ScalarValue> {
     // convert Python object to PyScalarValue to ScalarValue