BUG/MINOR: pollers: remove uneeded free in global init

Since commit d4604adeaa8c ("MAJOR: threads/fd: Make fd stuffs
thread-safe"), we init pollers per thread using a helper. It was still
correct for mono-thread mode until commit cd7879adc2c4 ("BUG/MEDIUM:
threads: Run the poll loop on the main thread too"). We now use a deinit
helper for all threads, making those free uneeded.

Only poll and select are affected by this very minor issue.

it could be backported from v1.8 to v2.1.

Fixes: cd7879adc2c4 ("BUG/MEDIUM: threads: Run the poll loop on the main
thread too")
Signed-off-by: William Dauchy <w.dauchy@criteo.com>
diff --git a/src/ev_poll.c b/src/ev_poll.c
index 538f070..8df2445 100644
--- a/src/ev_poll.c
+++ b/src/ev_poll.c
@@ -286,7 +286,6 @@
  fail_swevt:
 	free(fd_evts[DIR_RD]);
  fail_srevt:
-	free(poll_events);
 	p->pref = 0;
 	return 0;
 }
diff --git a/src/ev_select.c b/src/ev_select.c
index ab021b9..acfdbb9 100644
--- a/src/ev_select.c
+++ b/src/ev_select.c
@@ -255,7 +255,7 @@
 	p->private = NULL;
 
 	if (global.maxsock > FD_SETSIZE)
-		goto fail_revt;
+		goto fail_srevt;
 
 	fd_set_bytes = sizeof(fd_set) * (global.maxsock + FD_SETSIZE - 1) / FD_SETSIZE;
 
@@ -272,9 +272,6 @@
  fail_swevt:
 	free(fd_evts[DIR_RD]);
  fail_srevt:
-	free(tmp_evts[DIR_WR]);
-	free(tmp_evts[DIR_RD]);
- fail_revt:
 	p->pref = 0;
 	return 0;
 }