[China Network] Remove number of data centers (#17592)

Direct readers to the Cloudflare site.

Author: wolruf

src/content/docs/china-network/reference/infrastructure.mdx

@@ -8,8 +8,6 @@ sidebar:
 
 ## China data centers
 
-As of March 2022, there are more than 40 data centers operated by JD Cloud spanning over 35 cities across mainland China.
-
 For up-to-date information, refer to the [Cloudflare China Network](https://www.cloudflare.com/china-network/) page.
 
 ### Network IP addresses