chore(claude): drop the no-op Write() twin of the treesitter deny

A Write(<path>) permission rule matches nothing. File permission checks
consult only Edit(<path>) rules, which already cover every file-editing
tool — Write, Edit and NotebookEdit alike. Claude Code now warns about
the dead shape at session start.

The Edit() rule directly above this one was doing the whole job, so the
grammars were never unprotected and nothing changes here but the
warning. Worth noting the general hazard though: a permission rule that
silently matches nothing is indistinguishable from one that works, which
is the same failure mode as the git prefix-pattern bypass.

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

.claude/settings.json

@@ -39,7 +39,6 @@
     ],
     "deny": [
       "Edit(//var/mnt/data/projects/treesitter/**)",
-      "Write(//var/mnt/data/projects/treesitter/**)",
       "Bash(rm -rf /*)",
       "Bash(rm -rf ~*)",
       "Bash(rm -rf $HOME*)",