Remove page from whitelisted parameters

[KacperMekarski]

SEMrush seo report shows that we should remove page param from whitelist because it treats same URL as different sites:

SEO report example:

[KacperMekarski]

@MatthewKennedy yes, we have canonical meta tags included by CanonicalRails, but page param is whitelisted here so finally in case of index action it doesn't work as expected.
For example, when you enter https://spree-designs-staging.herokuapp.com/products?page=1, we have canonical tag as below:

When we remove page param from whitelist, we will have valid reference without query string.
Please have a look at this comment:

spree/frontend/config/initializers/canonical_rails.rb

Line 10 in f180f2b

# Parameter spamming can cause index dilution by creating seemingly different URLs with identical or near-identical content.

[MatthewKennedy]

Good catch!