Revert "core[patch]: Add check for bind tools in structured prompt (#…

…5882)" (#5909)

This reverts commit b7e4264.

langchain-core/src/prompts/structured.ts

@@ -1,5 +1,3 @@
-import { BaseLanguageModel } from "../language_models/base.js";
-import { BaseChatModel } from "../language_models/chat_models.js";
 import { ChatPromptValueInterface } from "../prompt_values.js";
 import {
   RunnableLike,
@@ -24,18 +22,7 @@ function isWithStructuredOutput(
     typeof x === "object" &&
     x != null &&
     "withStructuredOutput" in x &&
-    x.withStructuredOutput !== BaseLanguageModel.prototype.withStructuredOutput
-  );
-}
-
-function isBindTools(x: unknown): x is {
-  bindTools: (...arg: unknown[]) => Runnable;
-} {
-  return (
-    typeof x === "object" &&
-    x != null &&
-    "bindTools" in x &&
-    x.bindTools !== BaseChatModel.prototype.bindTools
+    typeof x.withStructuredOutput === "function"
   );
 }
 
@@ -97,8 +84,7 @@ export class StructuredPrompt<
 
     if (
       isRunnableBinding(coerceable) &&
-      isWithStructuredOutput(coerceable.bound) &&
-      isBindTools(coerceable.bound)
+      isWithStructuredOutput(coerceable.bound)
     ) {
       return super.pipe(
         coerceable.bound

langchain-core/src/prompts/tests/structured.test.ts

@@ -4,23 +4,15 @@ import {
   StructuredOutputMethodParams,
   StructuredOutputMethodOptions,
   BaseLanguageModelInput,
-  ToolDefinition,
 } from "../../language_models/base.js";
 import { BaseMessage } from "../../messages/index.js";
 import { Runnable, RunnableLambda } from "../../runnables/base.js";
 import { RunnableConfig } from "../../runnables/config.js";
 import { FakeListChatModel } from "../../utils/testing/index.js";
 import { StructuredPrompt } from "../structured.js";
 import { load } from "../../load/index.js";
-import { StructuredToolInterface } from "../../tools.js";
 
 class FakeStructuredChatModel extends FakeListChatModel {
-  override bindTools(
-    _tools: (StructuredToolInterface | ToolDefinition | Record<string, any>)[]
-  ): Runnable {
-    return this.bind({});
-  }
-
   withStructuredOutput<
     RunOutput extends Record<string, any> = Record<string, any>
   >(