Remove melaniedejong from Owners and Blunderbuss (GoogleCloudPlatform#4796)

* Update CODEOWNERS

* Update blunderbuss.yml

Author: melaniedejong

.github/CODEOWNERS

@@ -38,7 +38,7 @@
 /firestore/**/*.py                     @GoogleCloudPlatform/firestore-dpe @GoogleCloudPlatform/python-samples-owners
 /functions/**/*.py                     @ace-n @grant @GoogleCloudPlatform/python-samples-owners
 /healthcare/**/*.py                    @noerog @GoogleCloudPlatform/python-samples-owners
-/iam/**/*.py                           @melaniedejong @GoogleCloudPlatform/python-samples-owners
+/iam/**/*.py                           @GoogleCloudPlatform/python-samples-owners
 /iap/**/*.py                           @GoogleCloudPlatform/python-samples-owners
 /iot/**/*.py                           @gguuss @GoogleCloudPlatform/python-samples-owners
 /jobs/**/*.py                          @GoogleCloudPlatform/python-samples-owners

.github/blunderbuss.yml

@@ -69,10 +69,6 @@ assign_issues_by:
   - 'api: healthcare'
   to:
   - noerog
-- labels:
-  - 'api: iam'
-  to:
-  - melaniedejong
 - labels:
   - 'api: logging'
   to: