remove datafusion settings

Author: jayshrivastava

datafusion/sqllogictest/test_files/push_down_filter_regression.slt

@@ -214,9 +214,6 @@ set datafusion.execution.target_partitions = 1;
 # Ensure filter pushdown through AggregateExec still works when a ProjectionExec
 # reorders aggregate input columns.
 
-statement ok
-set datafusion.explain.physical_plan_only = true;
-
 statement ok
 create external table agg_reordered_pushdown stored as parquet location '../../parquet-testing/data/alltypes_plain.parquet';