ppp: drop enable-ipv6.patch

IPV6 has been enabled by default in 2.4.6

(From OE-Core rev: 14896ef9e3eb091591d25776f8f6a590294a874e)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/ppp/ppp-2.4.5/enable-ipv6.patch

@@ -1,15 +0,0 @@
-The patch comes from OpenEmbedded
-
-Upstream-Status: Inappropriate [enable feature]
-
---- ppp-2.4.3/pppd/Makefile.linux.orig	2005-10-28 21:07:40.396359250 +0100
-+++ ppp-2.4.3/pppd/Makefile.linux	2005-10-28 21:07:54.217223000 +0100
-@@ -62,7 +62,7 @@
- 
- HAS_SHADOW=y
- #USE_PAM=y
--#HAVE_INET6=y
-+HAVE_INET6=y
- 
- # Enable plugins
- PLUGIN=y