fix: let yolo inherit the common claude model

yolo pinned model to claude-fable-5[1m] while common sets opus[1m].
/model writes the live value into ~/.claude/settings.json, so any switch
away from fable-5 left the file drifted and mutableFiles aborted
activation on the next `nh home switch`. Dropping the override makes the
repo agree with the model actually in use.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

home/yolo/claude-settings.json

@@ -22,7 +22,6 @@
     ],
     "defaultMode": "auto"
   },
-  "model": "claude-fable-5[1m]",
   "hooks": {
     "PostToolUse": [
       {