refactor: Removes tenant ID check from rate limit logic

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py

@@ -86,8 +86,8 @@ class KnowledgeRetrievalNode(LLMNode):
             return NodeRunResult(
                 status=WorkflowNodeExecutionStatus.FAILED, inputs=variables, error="Query is required."
             )
+        # TODO(-LAN-): Move this check outside.
         # check rate limit
-        if self.tenant_id:
         knowledge_rate_limit = FeatureService.get_knowledge_rate_limit(self.tenant_id)
         if knowledge_rate_limit.enabled:
             current_time = int(time.time() * 1000)