fix: remove http delete-kinds regression

harness/tht/vectorstore/rest_client.py

@@ -150,22 +150,6 @@ class VectorRestClient:
             return int(payload.get("deleted", 0))
         return 0
 
-    def delete_kinds(self, table_name: str, kinds: list[str]) -> int:
-        try:
-            payload = self._call(
-                "delete_vector_kinds",
-                {"table_name": table_name, "kinds": kinds},
-            )
-        except VectorRestError as error:
-            if "HTTP 404" in str(error):
-                raise VectorRestError(
-                    "delete_vector_kinds RPC is unavailable; deploy the cleanup migration"
-                ) from None
-            raise
-        if isinstance(payload, dict):
-            return int(payload.get("deleted", 0))
-        return 0
-
     def list_evidence_generations(self, table_name: str, workspace_id: str) -> list[str]:
         if re.fullmatch(r"[a-z][a-z0-9_-]{0,63}", workspace_id) is None:
             raise ValueError("workspace namespace must be canonical")