Revert "Treble-ize tmpfs access"

This reverts commit dc804ad9278d1e1914ff925c3429ac9fc837611e.

Reason for revert:
This change is no longer necessary due to aosp/889855 which moves all
apps to a shared tmpfs type. It's simpler, and significantly less 
likely to cause build breakages in downstream trees.
Bug: 122854450

Change-Id: I612db7707c021939a30401c1d79241b00b1f5222
diff --git a/shared/sepolicy/gceservice.te b/shared/sepolicy/gceservice.te
index 6c77ed8..4881309 100644
--- a/shared/sepolicy/gceservice.te
+++ b/shared/sepolicy/gceservice.te
@@ -1,6 +1,5 @@
 # GceService app
 type gceservice, domain;
-type gceservice_tmpfs, file_type;
 app_domain(gceservice)
 
 # Use system services exposed as part of Android framework public API