Remove out-of-date comment. am: 85c1765b01

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1991627

Change-Id: Ie05c26b3e3d2571d9dd40d8569e14a68145e88a8
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 44f75b4..a5b97a1 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -44,7 +44,6 @@
     {
       "name": "TetheringPrivilegedTests"
     },
-    // TODO: move to presubmit when known green.
     {
       "name": "netd_updatable_unit_test",
       "keywords": ["netd-device-kernel-4.9", "netd-device-kernel-4.14"]