Remove redundant read_empty Rust binding, make Python read_empty an alias for empty_table

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: timsaucer

crates/core/src/context.rs

@@ -1217,11 +1217,6 @@ impl PySessionContext {
         Ok(PyDataFrame::new(df))
     }
 
-    pub fn read_empty(&self) -> PyDataFusionResult<PyDataFrame> {
-        let df = self.ctx.read_empty()?;
-        Ok(PyDataFrame::new(df))
-    }
-
     #[pyo3(signature = (path, schema=None, file_extension=".arrow", table_partition_cols=vec![]))]
     pub fn read_arrow(
         &self,

python/datafusion/context.py

@@ -1392,10 +1392,12 @@ def read_arrow(
     def read_empty(self) -> DataFrame:
         """Create an empty :py:class:`DataFrame` with no columns or rows.
 
+        This is an alias for :meth:`empty_table`.
+
         Returns:
             An empty DataFrame.
         """
-        return DataFrame(self.ctx.read_empty())
+        return self.empty_table()
 
     def read_table(
         self, table: Table | TableProviderExportable | DataFrame | pa.dataset.Dataset