[apache/incubator-teaclave] Duplicated docker compose files (#556)

[Gordon King]

Under the `docker` folder, it contains 2 identical files as follows. Is it 
necessary to keep both of them ? thanks.
![image](https://user-images.githubusercontent.com/10856796/134753346-84bccc28-cb26-430c-aa3f-03225ed04af6.png)


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