Update endpoints model

Author: AWS SDK for Go v2 automation user

codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json

@@ -18876,13 +18876,6 @@
           }
         }
       },
-      "private-networks" : {
-        "endpoints" : {
-          "us-east-1" : { },
-          "us-east-2" : { },
-          "us-west-2" : { }
-        }
-      },
       "profile" : {
         "endpoints" : {
           "af-south-1" : { },