Update CHANGELOG.md

Author: msyyc

sdk/elasticsan/azure-mgmt-elasticsan/CHANGELOG.md

@@ -21,12 +21,8 @@
 
 ### Breaking Changes
 
-  - This version introduces new hybrid models which have dual dictionary and model nature. And please follow https://aka.ms/azsdk/python/migrate/hybrid-models for migration.
-  - Deleted or renamed model `ElasticSanList`
-  - Deleted or renamed model `SkuInformationList`
-  - Deleted or renamed model `SnapshotList`
-  - Deleted or renamed model `VolumeGroupList`
-  - Deleted or renamed model `VolumeList`
+  - For the method breakings, please refer to https://aka.ms/azsdk/python/migrate/operations for migration.
+  - Deleted or renamed model `ElasticSanList`/`SkuInformationList`/`SnapshotList`/`VolumeGroupList`/`VolumeList` which actually were not used by SDK users
   - Method `VolumesOperations.begin_delete` changed its parameter `x_ms_delete_snapshots` from `positional_or_keyword` to `keyword_only`
   - Method `VolumesOperations.begin_delete` changed its parameter `x_ms_force_delete` from `positional_or_keyword` to `keyword_only`