remove timeout unittest

test=develop

paddle/fluid/framework/tensor.h

@@ -153,7 +153,7 @@ class Tensor {
 
   void set_layout(const DataLayout layout) { layout_ = layout; }
 
-  void clear() { holder_.reset(); }
+  void clear() { holder_ = nullptr; }
 
   const std::shared_ptr<memory::Allocation>& Holder() const { return holder_; }
   size_t offset() const { return offset_; }

python/paddle/fluid/tests/unittests/test_eager_deletion_seresnext.py

-# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import os
-import unittest
-os.environ['FLAGS_eager_delete_tensor_gb'] = "0.0"
-
-from test_parallel_executor_seresnext import TestResnet
-
-
-class EagerDeletionTestSEResNext(TestResnet):
-    pass
-
-
-if __name__ == '__main__':
-    unittest.main()