Remove dead code

ibis/pandas/execution/selection.py

@@ -259,24 +259,7 @@ def get_table_columns(expression):
 
 @physical_tables.register(ops.Selection)
 def physical_tables_selection(sel):
-    sel_table_op = sel.table.op()
-    selections = sel.selections
-
-    raw_root_tables = (
-        s.op().root_tables() for s in selections
-        if isinstance(s, ir.ColumnExpr)
-    )
-    root_tables = [tables[0] for tables in raw_root_tables if len(tables) == 1]
-
-    every_selection_has_one_root = len(root_tables) == len(selections)
-    every_root_is_a_physical_table = all(
-        table.equals(sel_table_op) for table in root_tables
-    )
-
-    # Special case a Selection that is a simple projection from a PhysicalTable
-    if every_selection_has_one_root and every_root_is_a_physical_table:
-        return [sel_table_op]
-    return [sel]
+    return physical_tables(sel.table.op())
 
 
 @physical_tables.register(ops.PhysicalTable)
@@ -345,14 +328,6 @@ def prune_overlapping_column_suffixes(selection_expr, data):
     # Columns from the input DataFrame
     data_columns = frozenset(data.columns)
 
-    # We either have 2 unique roots or every column is unique without a join
-    # suffix
-    assert len(suffixes) == 2 or not {
-        column for column in data_columns
-        if (constants.LEFT_JOIN_SUFFIX in column or
-            constants.RIGHT_JOIN_SUFFIX in column)
-    }
-
     possible_columns = []
     possible_used_columns = set()