Revert "pylayer support tuple/list type args (#37727)" (#37956)

This reverts commit a73064f2.

paddle/fluid/imperative/py_layer_fwd.h

@@ -101,28 +101,6 @@ py::object PyLayerApply(const platform::Place& place, const py::handle& cls,
               "`%s` type argument can not be cast into `Tensor`.",
               ptr->ptr()->ob_type->tp_name));
         }
-      } else if (py::isinstance<py::tuple>(*ptr) ||
-                 py::isinstance<py::list>(*ptr)) {
-        try {
-          auto tuple_arg = ptr->cast<py::tuple>();
-          for (auto iter = tuple_arg.begin(); iter != tuple_arg.end(); ++iter) {
-            try {
-              auto t = iter->cast<std::shared_ptr<VarBase>>();
-              input_vars.push_back(t);
-            } catch (py::cast_error& err) {
-              PADDLE_THROW(platform::errors::InvalidArgument(
-                  "The `PyLayer.forward` function contains invalid argument, "
-                  "the "
-                  "`%s` type argument can not be cast into `Tensor`.",
-                  ptr->ptr()->ob_type->tp_name));
-            }
-          }
-        } catch (py::cast_error& err) {
-          PADDLE_THROW(platform::errors::InvalidArgument(
-              "The `PyLayer.forward` function contains invalid argument, the "
-              "`%s` type argument can not be cast into `Tensor`.",
-              ptr->ptr()->ob_type->tp_name));
-        }
       }
     }
   }
@@ -141,28 +119,6 @@ py::object PyLayerApply(const platform::Place& place, const py::handle& cls,
               "`%s` type argument can not be cast into `Tensor`.",
               ptr->second.ptr()->ob_type->tp_name));
         }
-      } else if (py::isinstance<py::tuple>(*ptr->second) ||
-                 py::isinstance<py::list>(*ptr->second)) {
-        try {
-          auto tuple_arg = ptr->second.cast<py::tuple>();
-          for (auto iter = tuple_arg.begin(); iter != tuple_arg.end(); ++iter) {
-            try {
-              auto t = iter->cast<std::shared_ptr<VarBase>>();
-              input_vars.push_back(t);
-            } catch (py::cast_error& err) {
-              PADDLE_THROW(platform::errors::InvalidArgument(
-                  "The `PyLayer.forward` function contains invalid argument, "
-                  "the "
-                  "`%s` type argument can not be cast into `Tensor`.",
-                  ptr->second.ptr()->ob_type->tp_name));
-            }
-          }
-        } catch (py::cast_error& err) {
-          PADDLE_THROW(platform::errors::InvalidArgument(
-              "The `PyLayer.forward` function contains invalid argument, the "
-              "`%s` type argument can not be cast into `Tensor`.",
-              ptr->second.ptr()->ob_type->tp_name));
-        }
       }
     }
   }