Deprecate AWS Mobile Hub Part 1 (#3067)

Author: alextwoods

gems/aws-sdk-mobile/CHANGELOG.md

@@ -1,6 +1,8 @@
 Unreleased Changes
 ------------------
 
+* Feature - AWS Mobile Hub has been removed from the SDK because it has been discontinued.
+
 1.54.0 (2024-07-02)
 ------------------
 

services.json

@@ -804,7 +804,8 @@
     "models": "migrationhubstrategy/2020-02-19"
   },
   "Mobile": {
-    "models": "mobile/2017-07-01"
+    "models": "mobile/2017-07-01",
+    "deprecated": true
   },
   "Neptune": {
     "models": "neptune/2014-10-31",