Virt presubmits: Remove secetkeepr & policy test

These tests are covered by secretkeeper/TEST_MAPPING & have no
dependency in Virtualization/.

Test: N/A
Change-Id: Ic325aed573d3fbc3ec52a08a1bfe0da1fd680afd
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 58dcc06..1c4f5ca 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -36,15 +36,9 @@
       "name": "initrd_bootconfig.test"
     },
     {
-      "name": "libdice_policy.test"
-    },
-    {
       "name": "libapkzip.test"
     },
     {
-      "name": "libsecretkeeper_comm.test"
-    },
-    {
       "name": "libdice_driver_test"
     }
   ],