Framework Tests Cleanup: Removing CTS duplicate files

Updating test_defs.xml to remove the class attribute for
AndroidTests wrapper class that is going away.
diff --git a/testrunner/test_defs.xml b/testrunner/test_defs.xml
index 3fa40df..4d95c69 100644
--- a/testrunner/test_defs.xml
+++ b/testrunner/test_defs.xml
@@ -40,7 +40,6 @@
 <test name="android"
     build_path="frameworks/base/tests/AndroidTests"
     package="com.android.unit_tests"
-    class="com.android.unit_tests.AndroidTests"
     coverage_target="framework"
     continuous="true" />