Tidy up some Cannon Keys boards

[zvecr]

Description

• keyboard.c
  • matrix_init_kb not calling _user (was just flashing led on startup which im guessing was more important for previous debugging).
• ws2812.c
  • no longer used

@awkannan

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

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).