Remove warning of deprecation
Remove warning of deprecated overload of addcdiv_

Fix #4451
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=h1) Report
> Merging [#4477](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/efbc1c5a9d96048ab11f8d746fe51107cb91646f&el=desc) will **increase** coverage by `0.08%`.
> The diff coverage is `100.00%`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/4477/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #4477      +/-   ##
==========================================
+ Coverage   78.03%   78.12%   +0.08%     
==========================================
  Files         123      123              
  Lines       20477    20477              
==========================================
+ Hits        15980    15997      +17     
+ Misses       4497     4480      -17     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/optimization.py](https://codecov.io/gh/huggingface/transformers/pull/4477/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9vcHRpbWl6YXRpb24ucHk=) | `96.00% <100.00%> (ø)` | |
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/4477/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `88.50% <0.00%> (-0.17%)` | :arrow_down: |
| [src/transformers/file\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/4477/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9maWxlX3V0aWxzLnB5) | `73.85% <0.00%> (+0.41%)` | :arrow_up: |
| [src/transformers/data/processors/squad.py](https://codecov.io/gh/huggingface/transformers/pull/4477/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9kYXRhL3Byb2Nlc3NvcnMvc3F1YWQucHk=) | `34.07% <0.00%> (+5.41%)` | :arrow_up: |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=footer). Last update [efbc1c5...2e2abdc](https://codecov.io/gh/huggingface/transformers/pull/4477?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
