How to do image data cleanup after crawling from Google Search Images?

I am collecting the google search images, of custom data, but with that, I have downloaded some unnecessary data of images, how to remove that images for data clean up.

You’ll have to do it manually.
Or else If you have lots of junk images and the data is quite large (~100k images), you can train a binary classifier, which will let you filter atleast some junk images.
But in the end, you’ll have to do it manually even in case of classifier. Just to validate the complete set of data.