Remove unnecessary output file.

Lib/test/output/test_sax

-test_sax
-Passed test_attrs_empty
-Passed test_attrs_wattr
-Passed test_double_quoteattr
-Passed test_escape_all
-Passed test_escape_basic
-Passed test_escape_extra
-Passed test_expat_attrs_empty
-Passed test_expat_attrs_wattr
-Passed test_expat_dtdhandler
-Passed test_expat_entityresolver
-Passed test_expat_file
-Passed test_expat_incomplete
-Passed test_expat_incremental
-Passed test_expat_incremental_reset
-Passed test_expat_inpsource_filename
-Passed test_expat_inpsource_location
-Passed test_expat_inpsource_stream
-Passed test_expat_inpsource_sysid
-Passed test_expat_locator_noinfo
-Passed test_expat_locator_withinfo
-Passed test_expat_nsattrs_empty
-Passed test_expat_nsattrs_wattr
-Passed test_filter_basic
-Passed test_make_parser
-Passed test_make_parser2
-Passed test_nsattrs_empty
-Passed test_nsattrs_wattr
-Passed test_quoteattr_basic
-Passed test_single_double_quoteattr
-Passed test_single_quoteattr
-Passed test_unescape_all
-Passed test_unescape_basic
-Passed test_unescape_extra
-Passed test_xmlgen_attr_escape
-Passed test_xmlgen_basic
-Passed test_xmlgen_content
-Passed test_xmlgen_content_escape
-Passed test_xmlgen_ignorable
-Passed test_xmlgen_ns
-Passed test_xmlgen_pi
-40 tests, 0 failures