Update requirements.txt

requirements.txt

@@ -6,7 +6,7 @@ langchain>=0.1.17
 langchain-community>=0.0.21
 langchain-experimental>=0.0.17      # PythonREPLTool
 langchain-groq>=0.0.5               # Groq LLM wrapper
-langchain-hub>=0.1.4                # pulls the ReAct prompt template
+langchainhub>=0.1.21                # pulls the ReAct prompt template
 
 # --- Token counting ---
 tiktoken>=0.6.0
@@ -14,11 +14,9 @@ tiktoken>=0.6.0
 # --- Config / env helpers ---
 python-dotenv>=1.0.0
 
-# --- Web-search helper (Serper) ---
-requests>=2.31                      # Serper wrapper just calls HTTP
-
 # --- CSV / JSON loader deps ---
 pandas>=2.2
+
 # MIME sniffing (choose the right wheel automatically)
 python-magic!=0.4.27; sys_platform!="win32"
 python-magic-bin==0.4.14; sys_platform=="win32"