Migrate Test mapping

Postsubmit-only test groups don't need to be in a specific directory.

Bug: 283262732
Test: N/A
Change-Id: I133e7f5d013bb54cde9dfcb141e859dc693daa73
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/TEST_MAPPING b/libs/WindowManager/Shell/src/com/android/wm/shell/TEST_MAPPING
deleted file mode 100644
index 8dd1369..0000000
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/TEST_MAPPING
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  "ironwood-postsubmit": [
-    {
-      "name": "WMShellFlickerTests",
-      "options": [
-        {
-          "include-annotation": "android.platform.test.annotations.IwTest"
-        },
-        {
-          "exclude-annotation": "org.junit.Ignore"
-        }
-      ]
-    }
-  ]
-}