Many developers are looking for speeding site removing the versions of the files. But I studied for 2 years the behavior of customers and the ideal score to have consistent sales is something around 90 points in pagespeed. Above this there is no difference in sales and possibly compatibility issues.
Upgrades in the store drops sales 30%, due to broken or incorrectly displayed layouts. Customer interprets as a problem site and abandons your purchase.
So keep the updated versions for correct loading, to my understanding is very important.