Revert "Check "Unknown Sources" is Enabled by Default"

This reverts commit 594e9852cc4d34e966f2389c8be67aebb69fdc53.
diff --git a/tests/tests/provider/src/android/provider/cts/Settings_SecureTest.java b/tests/tests/provider/src/android/provider/cts/Settings_SecureTest.java
index c325abf..6ce4157 100644
--- a/tests/tests/provider/src/android/provider/cts/Settings_SecureTest.java
+++ b/tests/tests/provider/src/android/provider/cts/Settings_SecureTest.java
@@ -23,7 +23,6 @@
 
 import android.content.ContentResolver;
 import android.net.Uri;
-import android.provider.Settings;
 import android.provider.Settings.Secure;
 import android.provider.Settings.SettingNotFoundException;
 import android.test.AndroidTestCase;
@@ -179,9 +178,4 @@
         assertNotNull(uri);
         assertEquals(Uri.withAppendedPath(Secure.CONTENT_URI, name), uri);
     }
-
-    public void testUnknownSourcesOffByDefault() throws SettingNotFoundException {
-        assertEquals("Device should not ship with 'Unknown Sources' enabled by default.",
-                0, Secure.getInt(cr, Settings.Secure.INSTALL_NON_MARKET_APPS));
-    }
 }