update ignored files.

Author: jonahwilliams

ci/licenses_golden/excluded_files

@@ -128,11 +128,9 @@
 ../../../flutter/impeller/.clang-format
 ../../../flutter/impeller/.gitignore
 ../../../flutter/impeller/README.md
-../../../flutter/impeller/aiks/aiks_gradient_unittests.cc
 ../../../flutter/impeller/aiks/aiks_unittests.cc
 ../../../flutter/impeller/aiks/aiks_unittests.h
 ../../../flutter/impeller/aiks/canvas_unittests.cc
-../../../flutter/impeller/aiks/testing
 ../../../flutter/impeller/base/README.md
 ../../../flutter/impeller/base/allocation_size_unittests.cc
 ../../../flutter/impeller/base/base_unittests.cc