docs: remove shared IP pool reference from suppressions

Author: thomasgauvin

src/content/docs/email-service/concepts/suppressions.mdx

@@ -22,7 +22,7 @@ There are 2 types of suppression lists that can prevent emails from being sent t
 
 The global suppression list is a list of emails
 that have been flagged as problematic. Cloudflare Email Service will not send emails to email
-addresses on this global suppression list to preserve the reputation of the shared IP pool used for sending emails.
+addresses on this global suppression list to preserve sending reputation and deliverability for all users.
 
 Here are the factors that Cloudflare Email Service uses to determine emails to add to the global suppression list: