Removing tests for deprecated options in active support.

The two tests I'm removing here are actually duplicates of ``test_render_file``. The reason they are duplicates is historical: the options that these two tests were supposed to check were deprecated, and the person who deprecated these options forgot to remove the test.

The ``use_full_path`` option was removed in 3b3790a which stops ``test_render_file_not_using_full_path`` from being useful. Also, passing the template handler to render was deprecated in 43d27e9, which stops ``test_render_file_without_specific_extension`` from being useful.