Remove tzdata from staging allowlist.

This is redundant as it's already in prod.
Test: m nothing

Change-Id: I49f75ce9ed514b77df8089a90a0339a4ab3f1d0b

android/allowlists/allowlists.go

@@ -1359,8 +1359,9 @@ var (
 	// Staging-mode allowlist. Modules in this list are only built
 	// by Bazel with --bazel-mode-staging. This list should contain modules
 	// which will soon be added to the prod allowlist.
+	// It is implicit that all modules in ProdMixedBuildsEnabledList will
+	// also be built - do not add them to this list.
 	StagingMixedBuildsEnabledList = []string{
 		"com.android.adbd",
-		"com.android.tzdata",
 	}
 )