remove unused files

GPL_LIB/Smarty/demo/configs/test.conf

GPL_LIB/Smarty/demo/index.php

GPL_LIB/Smarty/demo/templates/footer.tpl

GPL_LIB/Smarty/demo/templates/header.tpl

GPL_LIB/Smarty/demo/templates/index.tpl

GPL_LIB/Smarty/unit_test/README

GPL_LIB/Smarty/unit_test/config.php

GPL_LIB/Smarty/unit_test/configs/globals_double_quotes.conf

GPL_LIB/Smarty/unit_test/configs/globals_single_quotes.conf

GPL_LIB/Smarty/unit_test/smarty_unit_test.php

GPL_LIB/Smarty/unit_test/smarty_unit_test_gui.php

GPL_LIB/Smarty/unit_test/templates/assign_var.tpl

GPL_LIB/Smarty/unit_test/templates/constant.tpl

GPL_LIB/Smarty/unit_test/templates/index.tpl

GPL_LIB/Smarty/unit_test/templates/parse_math.tpl

GPL_LIB/Smarty/unit_test/templates/parse_obj_meth.tpl

GPL_LIB/Smarty/unit_test/test_cases.php