Revert "feat(kanban): durable multi-profile collaboration board (#16081)" (#16098)

This reverts commit 15937a6b46.

cli.py

@@ -5818,28 +5818,7 @@ class HermesCLI:
 
         print(f"(._.) Unknown cron command: {subcommand}")
         print("  Available: list, add, edit, pause, resume, run, remove")
-
-    def _handle_kanban_command(self, cmd: str):
-        """Handle the /kanban command — delegate to the shared kanban CLI.
-
-        The string form passed here is the user's full ``/kanban ...``
-        including the leading slash; we strip it and hand the remainder
-        to ``kanban.run_slash`` which returns a single formatted string.
-        """
-        from hermes_cli.kanban import run_slash
-
-        rest = cmd.strip()
-        if rest.startswith("/"):
-            rest = rest.lstrip("/")
-        if rest.startswith("kanban"):
-            rest = rest[len("kanban"):].lstrip()
-        try:
-            output = run_slash(rest)
-        except Exception as exc:  # pragma: no cover - defensive
-            output = f"(._.) kanban error: {exc}"
-        if output:
-            print(output)
-
+    
     def _handle_skills_command(self, cmd: str):
         """Handle /skills slash command — delegates to hermes_cli.skills_hub."""
         from hermes_cli.skills_hub import handle_skills_slash
@@ -6076,8 +6055,6 @@ class HermesCLI:
             self.save_conversation()
         elif canonical == "cron":
             self._handle_cron_command(cmd_original)
-        elif canonical == "kanban":
-            self._handle_kanban_command(cmd_original)
         elif canonical == "skills":
             with self._busy_command(self._slow_command_status(cmd_original)):
                 self._handle_skills_command(cmd_original)