Revert "trigger CI extended tests"

This reverts commit c5da7ca.

Author: kosiew

datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs

@@ -648,12 +648,6 @@ impl ConstEvaluator {
             }
             Expr::Cast(Cast { expr, data_type })
             | Expr::TryCast(TryCast { expr, data_type }) => {
-                // Fast path: only struct targets need struct-specific foldability checks.
-                // For non-struct casts, avoid deriving the source type from an empty schema.
-                if !matches!(data_type, DataType::Struct(_)) {
-                    return true;
-                }
-
                 if let (
                     Ok(DataType::Struct(source_fields)),
                     DataType::Struct(target_fields),
@@ -5345,24 +5339,4 @@ mod tests {
             "Struct cast with empty (0-row) array should remain unchanged"
         );
     }
-
-    #[test]
-    fn test_cast_heavy_non_struct_chain_foldable() {
-        // Exercise a cast-heavy, non-struct simplification path to protect against
-        // planner regressions in cast eligibility checks.
-        let expr = (0..64).fold(Expr::Literal(ScalarValue::Int32(Some(7)), None), |acc, i| {
-            let target_type = if i % 2 == 0 {
-                DataType::Int64
-            } else {
-                DataType::Int32
-            };
-            Expr::Cast(Cast::new(Box::new(acc), target_type))
-        });
-
-        let simplifier =
-            ExprSimplifier::new(SimplifyContext::default().with_schema(test_schema()));
-        let result = simplifier.simplify(expr).unwrap();
-
-        assert_eq!(result, Expr::Literal(ScalarValue::Int32(Some(7)), None));
-    }
 }