Remove scripts dir instead of scripts module

[kclowes]

What was wrong?

make build-docs (which calls make docs clean) was failing because we took out the scripts/__init__.py and it couldn't find the scripts files to rm.

How was it fixed?

Now we remove the scripts directory before the doc build on make docs clean

Todo:

• [x] Clean up commit history
• [x] Add or update documentation related to these changes
• [x] Add entry to the release notes

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