fix: remove idx subbutton and lint fixes

[i2amsam]

Remove the button on the individual sample in favor or the button on the overall /samples/ directory. I'll look at adding the sub-button back, but it might need to wait for a FR in IDX to prevent duplication

Checklist (if applicable):

• [ x] PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• [ x] Tested (manually, unit tested, etc.)
• [ x] Docs updated (updated docs or a docs bug required)