It was used to conditionally install a Python module in the past. But that is not the case anymore since https://github.com/rustdesk/rustdesk/commit/37dbfcc. Now the check is obsolete.
Due to `set -e`, the check leads to a package configuration failure if Python is not installed, which however otherwise is not needed for RustDesk.
The commit includes an indentation fix and trailing space removal.
Signed-off-by: MichaIng <micha@dietpi.com>