chore: remove exclude-created-before from lock config (#1921)

.github/workflows/lock.yml

@@ -18,8 +18,6 @@ jobs:
           github-token: ${{ github.token }}
           issue-lock-inactive-days: 14
           pr-lock-inactive-days: 14
-          issue-exclude-created-before: '2020-10-01T00:00:00Z'
-          pr-exclude-created-before: '2020-10-01T00:00:00Z'
           issue-lock-comment: >
             This thread has been automatically locked since there has not been
             any recent activity after it was closed. Please open a 
@@ -29,4 +27,4 @@ jobs:
             This thread has been automatically locked since there has not been
             any recent activity after it was closed. Please open a 
             [new issue](https://github.com/aws/aws-sdk-js-v3/issues/new/choose)
-            for related bugs and link to relevant comments in this thread.
+            for related bugs and link to relevant comments in this thread.