remove extra files from unity folder

Unity/extras/eclipse/error_parsers.txt

Unity/extras/fixture/rakefile.rb

Unity/extras/fixture/rakefile_helper.rb

Unity/extras/fixture/readme.txt

Unity/extras/fixture/src/unity_fixture.c

Unity/extras/fixture/src/unity_fixture.h

Unity/extras/fixture/src/unity_fixture_internals.h

Unity/extras/fixture/src/unity_fixture_malloc_overrides.h

Unity/extras/fixture/test/Makefile

Unity/extras/fixture/test/main/AllTests.c

Unity/extras/fixture/test/template_fixture_tests.c

Unity/extras/fixture/test/unity_fixture_Test.c

Unity/extras/fixture/test/unity_fixture_TestRunner.c

Unity/extras/fixture/test/unity_output_Spy.c

Unity/extras/fixture/test/unity_output_Spy.h

Unity/test/.rubocop.yml

Unity/test/Makefile

Unity/test/expectdata/testsample_cmd.c

Unity/test/expectdata/testsample_def.c

Unity/test/expectdata/testsample_head1.c