Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/4124
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GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/4124
[FLINK-6920] Remove minor guava usages
This PR removes undeclared usages of guava in the following modules
```
flink-connector-elasticsearch
flink-connector-filesystem