## What changes were proposed in this pull request?
I was trying out pyspark on a system with only a `python3` command but no `python` command and got this error:
```bash
/opt/spark/bin/pyspark: line 45: python: command not found
```
I also noticed the bash syntax for the IPython version check is wrong: `[[ ! $WORKS_WITH_IPYTHON ]]` always evaluates to false when `$WORKS_WITH_IPYTHON` is non-empty
This PR simply eliminates the Python version check for executor at driver side when using IPython.
## How was this patch tested?
I manually tested the `pyspark` launch script and bash syntax stuff
Closes#23736 from soxofaan/master.
Authored-by: Stefaan Lippens <soxofaan@gmail.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>
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