signing: drop support for nvidia firmware

This was only used by smaug which went EOL a while ago and we've
already deleted supporting logic.

BUG=None
TEST=CQ passes

Change-Id: Ie6132f40f77a577eef9befc5d32c57b5c97eb73c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2309723
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
diff --git a/scripts/pushimage_unittest.py b/scripts/pushimage_unittest.py
index e5e2919..c8b2e92 100644
--- a/scripts/pushimage_unittest.py
+++ b/scripts/pushimage_unittest.py
@@ -298,7 +298,7 @@
     with mock.patch.object(gs.GSContext, 'Exists', return_value=True):
       urls = pushimage.PushImage('/src', 'test.board', 'R34-5126.0.0',
                                  sign_types=['recovery'])
-    self.assertEqual(self.gs_mock.call_count, 32)
+    self.assertEqual(self.gs_mock.call_count, 30)
     self.assertTrue(self.mark_mock.called)
     self.assertEqual(urls, EXPECTED)
 
@@ -316,7 +316,7 @@
     with mock.patch.object(gs.GSContext, 'Exists', return_value=True):
       urls = pushimage.PushImage('/src', 'test.board', 'R34-5126.0.0',
                                  sign_types=['base'])
-    self.assertEqual(self.gs_mock.call_count, 34)
+    self.assertEqual(self.gs_mock.call_count, 32)
     self.assertTrue(self.mark_mock.called)
     self.assertEqual(urls, EXPECTED)
 
@@ -334,7 +334,7 @@
     with mock.patch.object(gs.GSContext, 'Exists', return_value=True):
       urls = pushimage.PushImage('/src', 'board2', 'R34-5126.0.0',
                                  sign_types=['cr50_firmware'])
-    self.assertEqual(self.gs_mock.call_count, 32)
+    self.assertEqual(self.gs_mock.call_count, 30)
     self.assertTrue(self.mark_mock.called)
     self.assertEqual(urls, EXPECTED)
 
@@ -342,7 +342,7 @@
     """Verify nothing is signed when we request an unavailable type"""
     urls = pushimage.PushImage('/src', 'test.board', 'R34-5126.0.0',
                                sign_types=['nononononono'])
-    self.assertEqual(self.gs_mock.call_count, 30)
+    self.assertEqual(self.gs_mock.call_count, 28)
     self.assertFalse(self.mark_mock.called)
     self.assertEqual(urls, {})