LibRegex: Don't copy forked results twice

Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/cfcd6e770c
Pull-request: https://github.com/SerenityOS/serenity/pull/15994

Userland/Libraries/LibRegex/RegexMatcher.cpp

@@ -452,8 +452,6 @@ bool Matcher<Parser>::execute(MatchInput const& input, MatchState& state, size_t
                         (*it) = state;
                         it->instruction_position = state.fork_at_position;
                         it->initiating_fork = *input.fork_to_replace;
-                        it->capture_group_matches = state.capture_group_matches;
-                        it->matches = state.matches;
                         found = true;
                         break;
                     }