Fixed dependabot configuration (PowerShell#379)

Co-authored-by: Travis Plunk <travis.plunk@microsoft.com>

Author: RDIL

.dependabot/config.yml

@@ -31,10 +31,6 @@ update_configs:
     directory: "/release/preview/nanoserver1809/dependabot"
     update_schedule: "weekly"
 
-  - package_manager: "docker"
-    directory: "/release/preview/opensuse423/dependabot"
-    update_schedule: "weekly"
-
   - package_manager: "docker"
     directory: "/release/preview/ubuntu18.04/dependabot"
     update_schedule: "weekly"