Remove information about old categories

Author: johndowns

articles/reliability/availability-zones-service-support.md

@@ -57,13 +57,6 @@ The following tables provide a summary of the current offering of zonal, zone-re
 
 In the Product Catalog, always-available services are listed as "non-regional" services.
 
-Azure offerings are grouped into three categories that reflect their _regional_ availability: *foundational*, *mainstream*, and *strategic* services. Azure's general policy on deploying services into any given region is primarily driven by region type, service category, and customer demand. For more information, see [Azure services](availability-service-by-category.md).
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-- **Foundational services**: Available in all recommended and alternate regions when a region is generally available, or within 90 days of a new foundational service becoming generally available.
-- **Mainstream services**: Available in all recommended regions within 90 days of a region's general availability. Mainstream services are demand-driven in alternate regions, and many are already deployed into a large subset of alternate regions.
-- **Strategic services**: Targeted service offerings, often industry-focused or backed by customized hardware. Strategic services are demand-driven for availability across regions, and many are already deployed into a large subset of recommended regions
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-
 >[!IMPORTANT]
 >Some services, although they are zone-redundant, may have limited support for availability zones. For example, some may only support availability zones for certain tiers, regions, or SKUs. To get more information on service limitations for availability zone support, select that service in the following table.