Remove MicrodroidTestApp.signed

It was added to produce idsig file at build-time. It then became
obsolete as the idsig file is created at run-time.

Bug: N/A
Test: watch TH
Change-Id: I535f608f7e003e081426e0af3b0e485ab3486381
diff --git a/tests/hostside/Android.bp b/tests/hostside/Android.bp
index 9bab286..bc8a4a5 100644
--- a/tests/hostside/Android.bp
+++ b/tests/hostside/Android.bp
@@ -16,5 +16,5 @@
         "VirtualizationTestHelper",
     ],
     per_testcase_directory: true,
-    data: [":MicrodroidTestApp.signed"],
+    data: [":MicrodroidTestApp"],
 }