chore: remove .claude/settings.local.json from tracking

Followup to previous commit which only landed the .gitignore rule but
left the file still tracked in the index.

.claude/settings.local.json

@@ -1,9 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(grep \"\\\\.tsx$\")",
-      "Bash(awk '{print $NF}')",
-      "Bash(xargs -I {} basename {})"
-    ]
-  }
-}