sepolicy: Nuke sdfat from genfs

* To avoid duplicate with samsung vendors

Change-Id: I5ab6c671972aa90d67bf858131d001f317b6641a
diff --git a/common/private/genfs_contexts b/common/private/genfs_contexts
index 97887b9..64e51f0 100644
--- a/common/private/genfs_contexts
+++ b/common/private/genfs_contexts
@@ -1,4 +1,3 @@
 genfscon fuseblk / u:object_r:vfat:s0
-genfscon sdfat / u:object_r:exfat:s0
 
 genfscon sysfs /devices/virtual/timed_output/vibrator u:object_r:sysfs_vibrator:s0