project-lakitu: remove EC2 as datasource for azure in cloud-init

BUG=b/177017435
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I1c1507cfa86b4eb74eaecd4efc5b9272a3258767
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/10420
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
diff --git a/project-lakitu/app-emulation/cloud-init-config/files/azure/91-datasource-azure.cfg b/project-lakitu/app-emulation/cloud-init-config/files/azure/91-datasource-azure.cfg
index 2748fbf..7383df4 100644
--- a/project-lakitu/app-emulation/cloud-init-config/files/azure/91-datasource-azure.cfg
+++ b/project-lakitu/app-emulation/cloud-init-config/files/azure/91-datasource-azure.cfg
@@ -1,6 +1 @@
-datasource_list: [ Ec2, NoCloud, None ]
-datasource:
-  Azure:
-    set_hostname: False
-    agent_command: __builtin__
-
+datasource_list: [ Azure, NoCloud, None ]