net-misc/memcached: drop unused patch

Signed-off-by: Sam James <sam@gentoo.org>

net-misc/memcached/files/memcached-1.4.17-EWOULDBLOCK.patch

@@ -1,21 +0,0 @@
-errno.h(0P):
-    EAGAIN Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).
-
-    [...]
-
-    EWOULDBLOCK
-        Operation would block (may be the same value as [EAGAIN]).
-
-
---- a/testapp.c
-+++ b/testapp.c
-@@ -1840,6 +1840,9 @@
-                 switch (errno) {
-                 case EINTR:
-                     break;
-+#if (EAGAIN != EWOULDBLOCK)
-+                case EAGAIN:
-+#endif
-                 case ENOMEM:
-                 case EWOULDBLOCK:
-                     more = false;