Remove out-of-date comment.

Test: m
Change-Id: I1575c85c382b4fb9e9e3c04b5e70dab55cef4c60
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"]