ppp: remove discovery phase timeout hack patch

In the original code, the entire time delay of the discovery phase
is only 5+5x2+5x2x2 = 35s. Increasing timeout may be necessary if
discovery phase fails on first attempt. There is a chance to fix
the "Timeout waiting for PADO packets" issue by removing this patch.

Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Link: https://github.com/openwrt/openwrt/pull/16605
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/network/services/ppp/patches/205-no_exponential_timeout.patch

@@ -1,29 +0,0 @@
-pppd: Don't use exponential timeout in discovery phase
-
-This patch removes the exponential timeout increase between PADO or PADS
-discovery attempts.
-
-Signed-off-by: Jo-Philipp Wich <jo@mein.io>
-
---- a/pppd/plugins/pppoe/discovery.c
-+++ b/pppd/plugins/pppoe/discovery.c
-@@ -689,7 +689,9 @@ discovery1(PPPoEConnection *conn, int wa
- 	conn->discoveryState = STATE_SENT_PADI;
- 	waitForPADO(conn, timeout, waitWholeTimeoutForPADO);
- 
-+#if 0
- 	timeout *= 2;
-+#endif
-     } while (conn->discoveryState == STATE_SENT_PADI);
- }
- 
-@@ -719,7 +721,9 @@ discovery2(PPPoEConnection *conn)
- 	sendPADR(conn);
- 	conn->discoveryState = STATE_SENT_PADR;
- 	waitForPADS(conn, timeout);
-+#if 0
- 	timeout *= 2;
-+#endif
-     } while (conn->discoveryState == STATE_SENT_PADR);
- 
-     if (!conn->seenMaxPayload) {