Removed some unused gevent imports

import numpy as np

from PIL import Image, ImageFont, ImageDraw

from datetime import datetime

import gevent

import logging

        # While the iterator is not closed

        try:

            while True:

                gevent.sleep(1)  # Only serve frames at 1fps

                time.sleep(1)  # Only serve frames at 1fps

                # Reset stream

                self.stream.seek(0)

                self.stream.truncate()

from typing import Tuple

from expiringdict import ExpiringDict

import gevent

from openflexure_microscope.captures import CaptureManager

from openflexure_microscope.stage.mock import MissingStage