old_contents: import os
  import tweetstream
  from flask import Flask
  
  app = Flask(__name__)
  @app.route('/')
  
  def syriarightnow():
      return 'Hello World!'
  
new_contents: import os
  from flask import Flask
  
  app = Flask(__name__)
  @app.route('/')
  
  def syriarightnow():
      return 'Hello World!'
  
subject: Remove unnecessary import