Clean up rust_test_host TEST_MAPPING after default update am: 9da11f0ba2 am: a2270c5afb am: 230a197a51

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/aho-corasick/+/1591060

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8eb85bb5452fa4d02716039f6124f39bcb9b1222
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 7bc6ed2..6716814 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -2,10 +2,6 @@
 {
   "presubmit": [
     {
-      "host": true,
-      "name": "libsqlite3-sys_host_test_src_lib"
-    },
-    {
       "name": "libsqlite3-sys_device_test_src_lib"
     }
   ]