Remove CodeEditSymbols dependency

[rodionovd]

Description

CodeEditSymbols was added as a dependency in #301, but the custom symbols don't appear to be referenced anywhere in this project (unless I'm missing something of course 🤔 In which case please ignore!).

This PR removes the unused dependency.

Thanks!

Related Issues

n/a

Checklist

• [x] I read and understood the contributing guide as well as the code of conduct
• [x] The issues this PR addresses are related to each other
• [x] My changes generate no new warnings
• [x] My code builds and runs on my machine
• [x] My changes are all related to the related issue above
• [x] I documented my code