display: remove dontaudit for hal_memtrack_default

Bug: 181913683
Test: make pts -j60 pts-tradefed run pts -m PtsSELinuxTest -t
com.google.android.selinux.pts.SELinuxTest#scanAvcDeniedLogRightAfterReboot

Change-Id: I72963aed5aff9bcbf2de16b11b16033ca594d7f0
diff --git a/tracking_denials/hal_memtrack_default.te b/tracking_denials/hal_memtrack_default.te
deleted file mode 100644
index 8bb56ce..0000000
--- a/tracking_denials/hal_memtrack_default.te
+++ /dev/null
@@ -1,3 +0,0 @@
-# b/181913683
-dontaudit hal_memtrack_default vendor_ion_debugfs:dir { search };
-dontaudit hal_memtrack_default vendor_ion_debugfs:dir { search };