remove extra parentheses

[Masato Asou]

Hi,

ok ?
--
ASOU Masato

Index: lib/libc/sys/poll.2
===================================================================
RCS file: /cvs/src/lib/libc/sys/poll.2,v
retrieving revision 1.39
diff -u -p -r1.39 poll.2
--- lib/libc/sys/poll.2 21 Jan 2022 15:23:36 -0000      1.39
+++ lib/libc/sys/poll.2 12 Jul 2023 04:17:00 -0000
@@ -287,9 +287,9 @@ if (nready == -1)
        err(1, "poll");
 if (nready == 0)
        errx(1, "time out");
-if ((pfd[0].revents & (POLLERR|POLLNVAL)))
+if (pfd[0].revents & (POLLERR|POLLNVAL))
        errx(1, "bad fd %d", pfd[0].fd);
-if ((pfd[0].revents & (POLLIN|POLLHUP))) {
+if (pfd[0].revents & (POLLIN|POLLHUP)) {
        if (read(STDIN_FILENO, buf, sizeof(buf)) == -1)
                err(1, "read");
 }