fix: remove unused imports and clean up code in various files

test_simulation_files/api_endpoints.py

@@ -1,8 +1,9 @@
 #!/usr/bin/env python3
-from flask import Flask, request, jsonify
 import os
 import subprocess
+
 import requests
+from flask import Flask, jsonify, request
 
 app = Flask(__name__)
 

test_simulation_files/auth_manager.py

@@ -2,7 +2,6 @@
 import hashlib
 import pickle
 import sqlite3
-from flask import request, session
 
 
 class AuthenticationManager: