Update PULL_REQUEST_TEMPLATE.md (Azure#27704)

Author: dolauli

.github/PULL_REQUEST_TEMPLATE.md

@@ -16,9 +16,8 @@
 - [ ] Check this box to confirm: **I have read the [_Submitting Changes_](../blob/main/CONTRIBUTING.md#submitting-changes) section of [`CONTRIBUTING.md`](../blob/main/CONTRIBUTING.md) and reviewed the following information:**
 
 * **SHOULD** update `ChangeLog.md` file(s) appropriately
-    * For SDK-based development mode, update `src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md`.
+    * Update `src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md`.
         * A snippet outlining the change(s) made in the PR should be written under the `## Upcoming Release` header in the past tense. 
-    * For autorest-based development mode, include the changelog in the PR description.
     * Should **not** change `ChangeLog.md` if no new release is required, such as fixing test case only.
 * **SHOULD** regenerate markdown help files if there is cmdlet API change. [Instruction](../blob/main/documentation/development-docs/help-generation.md#updating-all-markdown-files-in-a-module)
 * **SHOULD** have proper test coverage for changes in pull request.