Remove unneeded boost dependencies due to C++17 migration.

Issue/feature addressed

Transition to C++17 has allowed a number of boost libraries to be replaced with their std:: counterparts. This means the library packages under Debian/Ubuntu no longer need to depend on some Boost packages.

Proposed solution

Remove the unnecessary dependencies.

Implementation

Removed the relevant lines from the control files.

Tests

Suggested reviewers

@dmoxey

Notes

N/A

Checklist

• Functions and classes, or changes to them, are documented.
• User guide/documentation is updated.
• Changelog is updated.
• Suitable tests added for new functionality.
• Contributed code is correctly formatted. (See the contributing guidelines).
• License added to any new files.
• No extraneous files have been added (e.g. compiler output or test data files).