Update TEST_MAPPING

Test: None

Bug: 236006683
Change-Id: I0f9b4e986b153122ce113c42d37c8fc208d61489
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 77642ba..9a60ded 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -11,11 +11,6 @@
       "path": "external/rust/crates/unicode-xid"
     }
   ],
-  "postsubmit": [
-    {
-      "name": "tinytemplate_test_src_lib"
-    }
-  ],
   "presubmit": [
     {
       "name": "tinytemplate_test_src_lib"