[Bug] Revert Assymmetrical Split Encoder support (#12090)

[drashna]

Currently, it causes the encoder update function to be spammed at startup. A fix isn't clear, nor will it be timely, most likely. Reverting for now, until a proper fix can be implemented.

Types of Changes

• Core
• Bugfix

Issues Fixed or Closed by This PR

• Issue reported and confirmed by @daskygit and myself.
  • https://discord.com/channels/440868230475677696/867530715192885269/913968054071885884

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).