chore(config-resolver): remove hostname from RegionHash/PartitionHash

Author: trivikr

packages/config-resolver/src/regionInfo/PartitionHash.ts

@@ -9,8 +9,6 @@ export type PartitionHash = {
   [key: string]: {
     regions: string[];
     regionRegex: string;
-    // TODO: Remove hostname after fully switching to variants.
-    hostname: string;
     variants: EndpointVariant[];
     endpoint?: string;
   };

packages/config-resolver/src/regionInfo/RegionHash.ts

@@ -6,8 +6,6 @@ import { EndpointVariant } from "./EndpointVariant";
  */
 export type RegionHash = {
   [key: string]: {
-    // TODO: Remove hostname after fully switching to variants.
-    hostname: string;
     variants: EndpointVariant[];
     signingService?: string;
     signingRegion?: string;