Remove unused TEST_MAPPING file.

Fix: 157099026
Test: just cleanup
Change-Id: I924032ca1ff7a61f2ef40beb8c41f00012b39927
diff --git a/services/core/java/com/android/server/wm/TEST_MAPPING b/services/core/java/com/android/server/wm/TEST_MAPPING
deleted file mode 100644
index b2e8bbe..0000000
--- a/services/core/java/com/android/server/wm/TEST_MAPPING
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "postsubmit": [
-    {
-      "name": "CtsWindowManagerDeviceTestCases"
-    },
-    {
-      "name": "FrameworksServicesTests",
-      "options": [
-        {
-          "include-filter": "com.android.server.wm."
-        }
-      ]
-    },
-    {
-      "name": "WmTests",
-      "options": [
-        {
-          "include-filter": "com.android.server.wm."
-        }
-      ]
-    }
-  ]
-}