The link is actually to a censored version of the review which omits the sentence "I should like to put it on record that I have never been able to dislike Hitler."
An uncensored copy of the review which does contain that sentence is here: https://gutenberg.net.au/ebooks16/1600051h.html
Here is a reference from the NYT to show that yes, he really said this: https://www.nytimes.com/1984/06/22/opinion/l-orwellian-ambiv...
The fact that most of the copies of Orwell's review of Mein Kampf have replaced this sentence with "..." is downright Orwellian.