Update TEST_MAPPING.

libbase and libziparchive both just moved out of system/core/, so I
don't think there's any value to running their tests when system/core/
changes. (I already added new TEST_MAPPING files to the two new projects.)

Test: treehugger
Change-Id: I0dd7acb525d9cca5349c55dc2724eab8d3a06afa

TEST_MAPPING

@@ -27,9 +27,6 @@
     {
       "name": "fs_mgr_vendor_overlay_test"
     },
-    {
-      "name": "libbase_test"
-    },
     {
       "name": "libpackagelistparser_test"
     },
@@ -60,15 +57,6 @@
     },
     {
       "name": "propertyinfoserializer_tests"
-    },
-    {
-      "name": "ziparchive-tests"
-    }
-  ],
-
-  "postsubmit": [
-    {
-      "name": "ziparchive_tests_large"
     }
   ]
 }