remove (currently) redundant check

jussi/cache/utils.py

@@ -30,8 +30,6 @@ def irreversible_ttl(jsonrpc_response: dict=None,
         return TTL.NO_CACHE
     try:
         jrpc_block_num = block_num_from_jsonrpc_response(jsonrpc_response)
-        if jrpc_block_num and jrpc_block_num <= last_irreversible_block_num:
-            return TTL.DEFAULT_TTL
         return TTL.DEFAULT_TTL
     except Exception as e:
         logger.warning(