Revert "Add mapping to trigger NetworkSecurity unit tests on presubmit for tethering-mainline-presubmit"

This reverts commit b54ea490504953dcd7c4e4ee8c8b7e5bcb01fc4b.

Reason for revert: Droidmonitor created revert due to b/397704210. Will be verifying through ABTD before submission.

Change-Id: I9ca21679c505c1db0ce40b607336dbf43abda011
diff --git a/networksecurity/TEST_MAPPING b/networksecurity/TEST_MAPPING
index 4fd5a45..448ee84 100644
--- a/networksecurity/TEST_MAPPING
+++ b/networksecurity/TEST_MAPPING
@@ -1,21 +1,4 @@
 {
-  "tethering-mainline-presubmit": [
-    {
-      "name": "CtsNetSecConfigCertificateTransparencyTestCases"
-    },
-    {
-      "name": "CtsNetSecConfigCertificateTransparencyDefaultTestCases"
-    },
-    {
-      "name": "NetSecConfigCertificateTransparencySctLogListTestCases"
-    },
-    {
-      "name": "NetSecConfigCertificateTransparencySctNoLogListTestCases"
-    },
-    {
-      "name": "NetworkSecurityUnitTests"
-    }
-  ],
   "presubmit": [
     {
       "name": "CtsNetSecConfigCertificateTransparencyTestCases"