Removed all files in /bin for sls dynamodb remove

**Actual Behaviour**

bash: /bin/ls: No such file or directory
bash: /bin/bash: No such file or directory

**Expected Behaviour**

sls dynamodb remove

**Steps to reproduce it**

I'm using docker image and I installed packages in the container.
```
$ sls dynamodb install . //version 0.2.35
$ sls dynamodb start --migrate
$ sls dynamodb remove
$ ls
bash: /bin/ls: No such file or directory
```

Reproduce the failure in the Docker-based setup using the listed install, start, and remove commands, then trace the implementation of the `dynamodb remove` command. Done means removal cleans up only the local DynamoDB installation and leaves `/bin/ls` and `/bin/bash` available.

Written by the indexing model from the issue text.