Update git submodules

* Update plugins/delete-project from branch 'master'
  to 3481845462f86959ff4ae4efb726e2bc3e494c3d
  - Add override to comply with new noImplicitOverride ts compiler option
    
    Google-Bug-Id: b/201385514
    Change-Id: I0b40385e0a4b1a9f67349dd0d674cb9202edd84c
    
diff --git a/plugins/delete-project b/plugins/delete-project
index 0b5bcbf..3481845 160000
--- a/plugins/delete-project
+++ b/plugins/delete-project
@@ -1 +1 @@
-Subproject commit 0b5bcbfc26d9c0559312ced40bb36a37f517b793
+Subproject commit 3481845462f86959ff4ae4efb726e2bc3e494c3d