Update app.py

app.py

@@ -9,10 +9,6 @@ from langchain.prompts.prompt import PromptTemplate
 from langchain.graphs import Neo4jGraph
 from langchain.chains import GraphCypherQAChain
 from langchain.memory import ConversationBufferMemory
-# importing necessary functions from dotenv library
-from dotenv import load_dotenv, dotenv_values 
-# loading variables from .env file
-load_dotenv() 
 
 NEO4J_URI = os.getenv("NEO4J_URI")
 NEO4J_USERNAME = os.getenv("NEO4J_USERNAME")
@@ -65,7 +61,6 @@ graph = Neo4jGraph(
     password=NEO4J_PASSWORD
 )
 
-
 chain = GraphCypherQAChain.from_llm(
     VertexAI(model_name='code-bison@002', max_output_tokens=2048, temperature=0.0),
     graph=graph,