Remove macro WHATWG_URL_SPEC_ISSUE_303

Because the URL standard fix whatwg/url#343 is
merged.

Tests: web-platform-tests/wpt#7326

src/url.h

@@ -30,10 +30,6 @@
 #include <vector>
 
 
-// https://github.com/whatwg/url/issues/303
-// https://github.com/whatwg/url/issues/303#issuecomment-298084064
-#define WHATWG_URL_SPEC_ISSUE_303 1
-
 namespace whatwg {
 
 // URL class
@@ -1481,12 +1477,8 @@ inline url_result url_parser::url_parse(url_serializer& urls, const CharT* first
             break;
 
         default:
-#if WHATWG_URL_SPEC_ISSUE_303
             if (base && base->is_file_scheme() &&
                 !detail::starts_with_Windows_drive(pointer, last)) {
-#else
-            if (base && base->is_file_scheme()) {
-#endif
                 url::str_view_type base_path = base->get_path_first_string(2);
                 // if base’s path[0] is a normalized Windows drive letter
                 if (base_path.length() == 2 &&

test/tests.cpp

@@ -205,9 +205,8 @@ int main(int argc, char** argv)
     err |= test_from_file(run_setter_tests, "w3c-tests/setters_tests.json");
 
 
-#if WHATWG_URL_SPEC_ISSUE_303
+    // more tests
     err |= test_from_file(run_parser_tests, "w3c-tests/urltestdata--issue-303.json");
-#endif
 
     return err;
 }